For 300 AAC Blackout, that point is 9 inches of barrel. These.300 Blackout barrels from Faxon Firearms are available in 3 different lengths, namely: 7.5’, 10.5’, and 16’. I’ve been bitten by both. However it is too short without a can. Posted by Nic Johnson on Sep 13, 2016. The 7.5’ and 10.5’ barrels come with a pistol length gas system, whereas the 16’ barrel comes with a carbine-length gas system. Important correction Mr. Leghorn: the SilencerCo Harvester suppressor provides about 30 dB of suppression according to your graphic, not 40%. And it is VERY quiet AND compact. Ask Foghorn: What Barrel Length for a 300 AAC Blackout Rifle? It will also be fitted with an Omega can. So, I don’t know, but it’s all very interesting to me. All of which can have an effect on how well your rifle performs. I get a lot of questions like this and figured that rather than responding to one specific email I should put it out there for other people as well. So in the case of .308, the longer barrel makes sense (at least 16 inches is needed to get full powder burn) because of the greater powder quantity. Passing through the sound barrier imparts wobble. For 300 AAC Blackout, that point is 9 inches of barrel. A second stamp for the suppressor, a separate serialized “firearm.”. Holy hell, look at the #s - the 12.5 I have 2 Colt M-16s that I’m going to convert to 300 Blackout. As for waiting on Sig Suppressors – good luck with that. Perfect for Special Forces or close-quarter battles, this rifle is quiet but deadly. Realize that this gun is SPECIFICALLY designed for ultra close covert CQB use and is not concerned with supers and 100% powder burn. 21.5Gr shows pressure signs. despite the short barrel. Notify me of follow-up comments by email. I was amazed at myself. A big boom, and a really big flash, sounds like fun, when fun is the goal, anyway. The ability to shoot full auto 300 BLK through an SBR with this can attached is impressive. The uppers all feature different length handguards, that accommodate the mounted flash suppressor. I was understanding that my 5.56 with 55 grain bullet needed a twist of 1:7 to be right. You dont lose anything by going 16in you gain about 200 fps not a big deal. Personally, if I had to do it all over again, I would definitely not go with a 762-SDN-6. The.300 Blackout was developed by AAC and they report the optimal barrel length for both subsonic and supersonic is 9". ANd then you have barrel harmonics to contend with. The Harvester is a great suppressor. This 9-inch barrel upper from Bravo Company comes with an 8-inch M-LOK handguard. Everything from .22lr to subsonic .308 Winchester, and even 5.56 NATO from a 16″ barrel. So would that be what they’re doing to make that so-called “dragon’s breath” novelty ammo, just adding a lot of extra powder to burn beyond the muzzle? A 9 inch barrel is definitely a handy length, but it is certainly not the fastest. This is why target shooters prefer short fat barrels — they distort less under heat and cool faster. Mike: yes. When deviating from the norm, gas control becomes an issue. Longer barrels are not automatically more accurate. It is made from quality materials with a very robust build. A major benefit for me of using a 10″ barrel on my blackout is that I can run a 9 or 10″ handguard and still be able to use my can, that extra inch opens up a little bit more options in handguards. Burn rates mean more than amount of powder in your cartridge. Best barrel length for 300 Blackout? The .44 Mag is well known for picking up considerable velocity from a carbine. I don’t think you can get there in 9 inches with full-size powder loads regardless of how fast-burning they are. It is much less sensitive to muzzle velocity loss through short barrels than the 5.56. The thing functions with everything……from 125 grain Sierra with 17 grains of Lil’ Gun to 220 grain Hornady with 10.5 of AA 1680. If you start with wanting a suppressed gun, you will eventually get to the 300. Your longer barrel does add minimal velocity. My wife and I both took deer this year with our .300 blacks, they are virtually identical at 16" pistol gas, little or no recoil and quite accurate, for deer hunting we use handload 125 gr Nosler Ballistic tip and works very good. I assume that something between 9-11” with a twist … 2) would you build again with the same silencer? Get a free-floating handguard with either M-Lok or Keymod attachment systems. One for the M16 regardless of barrel length. I dont think they are shipping as of yet…which is a big question why. Just more satisfying to me than a “real press’. Not all 7.62 cans are as effective, my Ti-Rant 9 suppresses subsonic 300BLK better (subjectively) than the 762-SDN-6. First, you need at least 2,500 fps to guarantee that the initial wound cavity causes permanent damage to the organs near the entry wound. Pretty much the only reason for a 16″ 300BLK is if you don’t ever plan on running a suppressor and don’t want to register as an SBR. Hi Lance, well I thought like you did, stick it on and go but being a dumb old guy I did not bother to research much. I would look into making/getting a telescopic suppressor (“reflex” design). Even the .357 magnum picks up considerable velocity when shot from a 16″ or 18″ carbine. Able to suppress all rifle calibers up to and including 300 Winchester Magnum, it’s perfectly at home on the 300 BLK rifle offering about 40% sound reduction. That is more muzzle energy than a 230-grain .45 ACP load yet includes the ability to fire more accurately and at greater distance while utilizing the same 30-round magazines you already have. You can either start with a barrel length, or a baseline load. There are lots of better options that have come on to the market in the last few years, and the 762-SDN-6 just hasn’t held up to the newer competition. The 4 Best .300 AAC Blackout Rifle in 2020 Reviews. Have had a LOT of different AR’s including a Colt upper in 7.62×39 that I killed my first deer with! They result in less range and more bullet drop at distance. I wonder, though, whether people ascribe greater accuracy to a longer barrel, thinking longer barrel = straighter trajectory, when really it’s that longer barrel = greater velocity, which in turn implies less susceptibility to random wind movements? There was an article on TTAG maybe a year or so ago comparing velocity loss from from a 5.56 16″ vs 10″ and a 300BLK from 16″ to 9″. With Remington 120gr suppers I'm getting just under 2000fps. They designed it for the needs of Special Forces to be real compact (as an Mp-5) and QUIETER than an MP-5. dear sirs..just want you all to know how much, ..WAY DOWN DEEP IN THE PINEY WOODS WOOTEN. Stay tuned, because we will have more information on them as soon as that information becomes available. .300BLK may be great in a 9″ barrel with some loads (powder, charge weight, primer, bullet, internal case capacity, etc. Bearing in mind optimal doesn’t imply that it’s necessary, for the.300 Blackout delivers acceptable performance with a barrel as short as 4.5-inches. On the flip side SIG SAUER seems to think that 6 inches is perfect for them (their new MCX uses a 6-inch barrel). Semi-Automatic Rifles. With the can on it, it also is ear safe and the 25yd accuracy is like the other one with the same type red dot. Subsonic 220Gr loading is 9.6Gr IMR 4227 and that is a near capacity load – I’d guess there is room for 11Gr. Maybe not so much that the longer barrel is directly responsible for greater accuracy, but indirectly? Ask Josh: Do I Need A 6.5 Creedmoor To Shoot Long Range? Could you comment further on the ratchet latch on your SDN-6 failing? I really like my 8" upper. Both AAC and Noveske use a 1:7 twist rate, while the PWS 300 BLK upper uses a 1:8 twist. I was thinking something along those lines, too. I make my living building high end audio equipment, I can’t afford “ear damage”. You forgot one thing in your calculation – powder quantity. The extra speed can be so great as to cause bullet failure. Copyright © 1996-2021 AR15.COM LLC. Next, best for the money, we’ll be looking at a .300 Blackout suppressor. Any 2015 announcement would probably not hit shelves until 2017 and then figure the ATF wait and you are probably going to need to wait until 2018 to get your suppressor. FYI an 8' 300blk barrel has less flash/blast than an 18' .223! It’s the pressure of expanding gas behind the bullet that accelerates it, and it doesn’t fall off at 9″. the 30BR has 38.4 grains capacity versus I believe the AAC has a 31.4 grain capacity. That’s water weight capacity. My plan is to SBR/suppress … And now for the killer………..I dumped ALL my 5.56 stuff, all of it including the progressive press set up just for it, and went full in on 300 BLK. It is a niche gun not even available to the public. A 10-inch barrel on an AR pistol or a short barreled rifle is perfect for the.300 Blackout. On a gun you plan to carry, super heavy barrels are not ideal. Some powders should not fill the case because of their density and overpressure problems with that much powder. Greater velocity, if the longer barrel enables such, leads to a farther maximum point blank range. Honestly hadn't thought about the rifle requirements. The difference between H4198 and TITEWAD would be a good example. 5 models BSF Barrels AR-15 .300 AAC Blackout Carbon Fiber Barrel As Low As (Save Up to $24.95) $426.55 5 models Faxon Firearms 300 Gunner Rifle Barrel (34) As Low As (Save Up to $9.45) $142.50 Best Rated Also, the 300 BLK shoots faster from a 16″ barrel than a 9″ barrel, particularly with supersonic loads. Some experts say you need 3,000 fps because the bullet rapidly slows down after it leaves the muzzle a… The point is, based on the design parameters of the 300BLK round while you do get more velocity from a longer barrel the % increased velocity per inch increase in barrel isnt as much as with say a 5.56. When barrel friction on the bullet is greater than gas pressure behind the bullet, the bullet will slow. TKS! These can handle barrels measuring up to 16 inches in length. Sig ONLY uses that 6.75″ (not 6″) barrel length for their Military full auto Black Mamba entry gun MCX. Drop is predictable; wobble is not. how much difference in sound is between a 30-30 and a300black out with a can on it. In an SBR (short barreled rifle) pushing subsonic loads, the optimal barrel length is 10.5-inches with a 1:7 rifling twist. Wow!! So anyway, as I said, I did not bother to do anything but read about reloading data……knew nothing about “over or under gassing” or any of the other weird things. So many thanks for your article and any advice you can give. That way you could further save length on the rifle. . I just ordered a 16 inch barrel and stuck it on my Stag upper. I recommend the Silencerco Omega FTW. Therefore, long range .22LR shooters stick to subsonic ammo in order to avoid the sound barrier transition. I have an 8" upper and a 16" upper. I came here for a clue about what barrel to get for a pistol build, but I know once I have it I’m going to want a real stock and a suppressor. It features a round, free-floating handguard; a 9-inch, chrome-lined, chrome-moly-vanadium barrel; a buffer tube with a … Its remarkable 5” compactness offers shooters a premium .30 caliber option when minimum size is essential. Not sure, and maybe I’m just splitting hairs. Sure, many Blackout shooters will use supersonic loads for hunting and defensive situations. CLICK FOR BEST PRICE. The old 55 grain ammo used the 1:9 twist , the new 63 grain uses the 1:7 twist – heavier bullets need more spin to stabilize and the tighter twist actually increase velocity by increasing “dwell” time. The last thing you ever want is a loosening silencer while shooting rapid fire or full auto. … Unscrewing a muzzle device and replacing it with a suppressor in the field sucks. .300 Blackout 240 grain; muzzle velocity 1000 FPS, muzzle energy 533 ft-lbs. My guess is your luck will be like mine. Any insight on following: When cartridge manufacturers and handloaders find that optimal balance between a longer, heavier … That number comes from multiple conversations with the people who designed the 300 AAC Blackout cartridge, did the initial testing, and who continue to design guns around that caliber. Secondly (and the reason why my second .30 suppressor is fast attach) is that I have multiple firearms that I take to the range and want to be able to quickly switch between them. Anderson Manufacturing 300 Blackout 16" Barrel - 1:7 Twist - M4 Medium Contour - Carbine Length Gas System - B2-K004-CN06 . I have an 8' myself that is great. PWS is as close as you can get right now. Play around with powders too much handloading and you screw up the timing on the gas system. This means that it won’t add much length to your gun’s barrel. Consider a cartridge that has enough energy to travel 1000 yds in free air, standard conditions. Best 300 Blackout AR Pistol barrel. – Adjustible Gas Block??? Hey all. I need you to read this test by The SIlencer Shop that shows the SDN can at an enormous disadvantage when shot with 300 BO subs. It’s really hard to find data on accuracy down-range with different lengths and types (prob just go with AAC as they seem well respected, but would really like to find the most accurate nitrided barrel made). M-Lok is generally the best option for most people, but Keymod is fine if you already have Keymod compatible accessories. Like you stated, as long as there is more pressure pushing the bullet forward than barrel friction retarding it, the bullet will continue to accelerate. Seems a waste of powder if all it does is make a boom at the end. Then you can also pick a slightly faster burning powder to get a complete burn in 16″ of barrel. 9″ AAC 1:7 melonite barrel is the best I’ve tested. There is no real difference in muzzle blast from either, both rifles use identical Surefire brakes. But its the opposite with the 300 AAC? Save my name, email, and website in this browser for the next time I comment. Velocity will increase as long as there is sufficient pressure behind the bullet to accelerate it. After a lot of research over many years with several incarnations of this cartridge, I'd say 8.5"-10.5" is the ideal range for barrel length, with anything from 9.0"-10.0" being stand-outs. It could, if you’re hand loading. Otherwise, even though the initial wound cavity may look cool in ballistic gelatin, it is not enough to cause any real damage. I like loading 300blk with a hand press for some unknown reason…..I developed an affinity for the hand press when I was loading for my 460 XVR. Plus higher velocity typically requires less hold over. A lighter gun via barrel would allow more other things to be used. Here is the old barrel length again… Longer barrels have been proven to have better velocities and it depends on your burn rate on your powder whether you get the full use of your barrel. While you can, that is. I reckon most of us can read between the lines on that. Sig does plan for a civilian 300 barrel. From … Question of the Day: How Do You Spread the Pro-Gun Gospel? ps…….the “arm brace” apparently was deemed legal by ATF for “incidental resting on your shoulder”. I’ve not shot it w/o the can. And the fps gain is not significant enough to go with anything longer. ), while others may be better in 8″ or 10″ barrels. In short, 9 inches is perfect for a 300 BLK barrel. The best 300 Blackout upper overall is the Radian Weapons Model 1 with a 9-inch barrel… Reader Pete writes: Hi Nick, I live in Amarillo and really enjoyed your article on your 300 BLK build. I'm not too familiar with BO but it seems like anything over 10 inches is too much, confirm or deny? I think you still have cut the barrel down if you want a shorter barrel. When entering the subsonic world you are going to be factoring in a suppressor, different ammunition types, barrel sizes, and gas systems, buffer tube weights. A pistol-length gas system is located just four inches away from the barrel of an AR-style rifle. Maybe he purchased them for a few hundred dollars prior to 1986 or inherited them from someone who purchased them for a few hundred dollars prior to 1986. I did 100 rounds a night for 6 nights. There is obvious powder burn outside the barrel which is clearly visible on video. And according to Silencerco, this silencer reduces sound up to 119dB when used with a 300 AAC Blackout. For you math types out there, a 30 dB reduction is enormous — actually better than some earmuffs if the number is correct. Help me if I’m missing something here. The 4 Best .300 AAC Blackout Rifle in 2020 Reviews. A fast attach lets me do that. So if your really tall and or are never going to run a can go for the longer barrels. Out of stock View Details » View Details » Wilson Combat TR300RCPG16RT7 Barrel 300 … QA/QD systems may add more tolerance stacking and complexity, but the silencer is snug and firm. Slightly longer and wider; 4. But shortening the guns usually has resulted in less accuracy. Best Barrel Length For 300 Blackout What’s the magic number for .300 BLK barrel length? The AAC uses a similar weight and dimensional bullet as a 30BR and 20 inch barrels and longer are the standard for those highly accurate bolt guns. At this point, you should use internal ballistic calculation tools to match your selected variable to the other. A more rigid barrel is better. I also note that this info is hard to find anywhere else, boiled down to “what works, for the average guy” based on a lot of industry insider info- and trying different things, and that is all you, Nick, and TTAG. Hope this helps. I would recommend the Silencerco Saker 7.62 instead. A buddy has a 100yd range in his back yard. Their POI remains more consistent. For those looking for a rifle can and not worrying about rimfire or pistol calibers, the SilencerCo Harvester is perfect. SIG Sauer SRD762-QD. 3rd Best .300 AAC Blackout Suppressor. As for silencers, either wait for the SIG SAUER cans to come on the market or get yourself an AAC MG-SD. While I can see Nick’s point in preferring screw on suppressors over fast attach systems, there are reasons why the fast attach is superior in some cases. Comparing my 5.56 barrels (18.5″, 14.5″ and 10.3″) is a whole different story. said. The Aero Precision M4E1 16in .300 Blackout Barrel Complete Upper Receiver is the best 300 blackout barrel on the market. That typically occurs in much longer barrels that are commonly in use. Preparing for 300 BLK upper build and have further questions: I want to use ‘both’ sub and supersonic ammunition and am a reloader so leaning toward the 1/8 twist to take advantage of the calibures flexibility. Those rounds like a slower twist, something closer to 1:10, but no one seems interested in making a barrel for that. Close. The first is a worthy contender for best home defense .300 Blackout AR-15 uppers use, the… Bravo Company BCM 300 Blackout 9″ Barrel MCMR-8. It is ear safe with subs and damn near it with supersonics. The 30 BR is expected to shoot sub .5 MOA out to 300 meters and weight is at a premium for most of these guns. There is almost NO need to have a barrel longer than 8-9″. And yes, the .300 blk is designed to burn off in 9″, but its not guaranteed that every round you could possibly put through it will do so. There is, however, a point of diminishing returns. Sure, you could just leave the suppressor attached, but I’d rather not have it see the wear and tear if it doesn’t need to. Accuracy is hard to figure…….I have a real 25 yd range and with the red dot thing on it it stuffs all loads into a ragged hole but the point of impact does vary between them. A measurement of 130db is horrible. However, untold numbers of people have had excellent results using 7.5 to 10.5" pistol barrels. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. Since the paperwork and tax didn’t kill you, and they already have your fingerprints, you’re gonna want to SBR it. Nine inches of barrel will give you the perfect balance of light weight and velocity with the 300 BLK cartridge. These gas systems can handle barrels up to 16’ in length, and are often used when chambered with subsonic.300 Blackout rounds. Damn was my arm sore on the 7th day, so I rested . I strongly suspect that’s where this comes from. – Lantac or Gemtech BCG (want to ensure proper cycle) Not even from a 300 BLK. [Email your firearms-related questions to “Ask Foghorn” via [email protected]. As for silencers, there’s some competition out there. Mightn’t a fast burning powder expand completely enough to be maximized in a 9″ barrel, while a slower burning powder would need greater length of barrel to maximize the burn? And anything over 75 grain was better with a 1:9 twist. You are incorrect on one critical detail: “Adding more barrel length after that point might still increase the velocity a bit, but the added weight isn’t always worth the extra dollop of velocity.”. Thread starter Willie Miller V; Start date Jul 17, 2018; Jump to latest Follow Reply Forums. Best barrel length for 300 Blackout? Its not going to be long until you want to suppress it and/or SBR it. If you’re pressed on time, here’s a quick list of the best 300 blackout rifles: Springfield Armory Saint: Best Overall .300 AAC Blackout IWI Tavor X95: Best for CQB Wilson Combat AR-15 Ranger: Best .300 Blackout Rifle for Hunting; Daniel Defense DDM4 V7P 300 Blackout: Best for Home Defense The stiffer barrel damps harmonics. Mission accomplished. For 5.56 NATO, that point is 20″ of barrel. Now it’s a chicken and egg thing. The "best" barrel length depends on a lot of things. A fast burning powder might fully burn in those 9 inch of barrel, but even so, the pressure at the end will still be way higher than it is outside the barrel – and hence the accelerating force on the bullet will still be more than friction. This gas system is best used for those who have subsonic 300 Blackout rounds. But what really makes me love it is the wide variety of calibers it can be used on. AR15.COM is the world’s largest firearm community and is a gathering place for firearm enthusiasts of all types. That number comes from multiple conversations with the people who designed the 300 AAC Blackout cartridge, did the initial testing, and who continue to design guns around that caliber. Higher velocity results in less drop at longer ranges, which of course effects point of impact. This 300 Blackout Barrel from BSF features a length of 16 inches and a durable body made up from 416R stainless steel. What happened to the big appeal of the 300 AAC for the average guy when this round was first released, which was “you can put it on any AR-15 upper you have and go shooting”?? It has a very short barrel and runs a long 9″ can. I'd go 16, balances better than 18 and shorter for easy carry. The SDN just doesnt silence 300 Black very well. In this ratio, the smaller the second number is, the faster the bullet spins, while a larger second number will indicate a slower rate. Would be really nice to be “accurate” (reliably hit 12″x12″ target at 200..maybe 250 yards?) They can run any barrel length without an additional stamp. It only takes a barrel of around 8-9" to burn all the powder. Don’t forget that longer barrel = greater sight distance for iron sights. Lots of reasons for one to get get launched down range, but most have one thing in common, HUMAN ERROR. We are not only talking about powder burn, but the pressure created by the expanding gasses of the powder. 5.56 pistols from 8 & 9″ barrels blow fireballs out of the barrel. You have entered an incorrect email address! It was designed to burn in short barrels and anything more is really just excess weight. Pistol length gas systems would locate just a mere 4’ away from your barrel. Here's an approach I used when I started hunting with the Blackout: Navy SEAL ROASTS Andrew's Home Defense Rifle, [ARCHIVED THREAD] - best barrel length for 300 blackout. I … http://blog.silencershop.com/300-blk-impressions/ Posted by 2 years ago. Groups 110% of the size of my 16″ 5R barrel on the 700 test gun. Having the barrel + suppressor be only 9+4 inches (13) long would be neato. SOCOM 7.62 Mini suppressor. In his free time, he's a competition shooter (USPSA, 3-gun and NRA High Power), instrument rated private pilot, and enjoys mixing statistics and science with firearms. Appreciate so much your sharing of experience so that I don’t have to go through all the same trial and error. This is not a function of the dimensional cartridge at a top level so much as it is a function of the SPECIFIC loaded cartridge you are using. – Wilson Combat 11.3″ barrel (worried this is too long) Archived. It also singes the hair on my knuckles. Nowhere above did anyone mention the gas port or that once the bullet passes the gas port there’s a significant reduction in pressure pushing the bullet and significantly more drag due to friction . FBI: Crime Rate Dropped During 2013, Year of Record Gun Sales. These days, #1 on my list, especially for new silencer owners, is the Liberty Mystic-X. I prefer 135gr bullets for hunting myself, because they are a good compromise between Sectnl. Jul 20, 2013 255 19. More caliber options; Quick-release system ; Short and lightweight can; Rated for automatic fire; Reduces Rifle Noise; CONS. Heavy, expensive, and absolutely fantastic. If you build an AR pistol, the 300 is the perfect round. Dumb question- How many stamps would an M16 with a short barrel and a suppressor require? To add I’m also a lefty so want to manage the gas as much as can be done. Consider a rifle with a barrel 1000 yds long. How is the recoil of the 6.8 vs 300 Blackout? 300BLK vs. 5.56? Except if it some of those overbuilt pistol cans that are rated for subsonic rifle ammo. Once all of the powder in the case has been burned, there’s no more fuel to add to the combustion and the gasses are at their maximum energy. Better question still. The overall length of this all-black weapon is 35.5 inches, with the barrel being 16 inches long. To the OP, I will assume you mean for hunting deer and/or hogs. And cheaper to boot. ACC will tell you that there is so litte increase in velocity over 16" that it isn't worth it. 300BLK supers wont touch the 6.8SPC in a carbine length or longer barrel, and if you dont plan to suppress or run an SBR is just a way better choice. One of the most common questions we get in … With or without the can. I do anticipate hunting deer / pig with this build supersonic of course. I took that pistol with 220 grain ELD-X over 10.6 grains of AA 1680 And hit the 19″ plate the second shot with the red dot! I then hit it 15 times in a row. Designed specifically for 300BLK and 7.62×39, rated for .308 WIN in 16″ or longer barrels. Would a shorter barrel make it quieter? Exactly what Int19h (?) However, heat build up effects point of impact. I have a 762-SDN-6 suppressor on a 300 BLK rifle I built with a 16″ barrel shooting subsonic 220gr ammo but I don’t get the tick, tick, tick when shooting. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. I had a table at the local gun shows for years. Editor’s Choice: Aero Precision M4E1 16in.300 Blackout Barrel Complete Upper Receiver Undoubtedly the best 300 blackout barrel you can buy today, the Aero Precision M4E1 16in.300 Blackout Barrel combines a sleek, attractive appearance with a range of practical features. Any time you put a can on a rifle, an adjustable gas block will allow you to tune it. Just an old farts opinion! Velocities over my 9″ AAC barrel are surprisingly mild, about 30-40 FPS for subsonic and about 100 FPS for supersonics. Not a bad question at all. You will get. The best 300 Blackout upper barrel length is 7 to 12 inches, with a twist rate of 1:5 or 1:7. It was specially designed for working with the 300 Blackout cartridge. Had a few questions for you if you’d be so kind as to give me a bit of advice . That’s 8 inches of barrel for the 300 BLK 1-8. For marksmen who value accuracy but wish to reduce recoil and loud rifle blasts during training sessions, a 300 Blackout SBR barrel is one of the best upgrades to buy for the M4 carbine. Minuteman. The barrels are all equipped with a standard A2 muzzle brake that’s been proven efficient and effective. The latter will stop the bullet long before it exits the barrel due to the additional forces of friction opposing opposing the bullets forward movement. That’s the one, and only reason I’m so anal about checking mine on the range, or in the field. You will get some velocity increase over an 8" barrel with a 16" barrel, at the cost of more weight. Compare that to the public allow more other things to be bearer of bad.... My “ walking dead ”, LEGAL, form 1 Maglite silencer on it free air standard... Feeding in AR magazines and created wear on the ratchet latch on SDN-6... Suppress it and/or SBR it and error take to count to two stamps the timing, with. The last thing you ever want is a whole different story inches long is a... 10-Inch barrel on the gas system barrel has less flash/blast than an Mp-5 ) and QUIETER an! Gas is on the internet you ’ d be so kind as to give me a of... My living building high end audio equipment, i don ’ t think still... That 6.75″ ( not 6″ ) barrel length for their MCX an “ arm brace ” was... For new silencer owners, is the best i ’ m missing something here cans to come on the,. In less accuracy slight amounts too much,.. way down DEEP in Field! Sub and super-sonic ) near capacity load – i ’ ve ever noticed, experienced allow! Should not fill the case because of their density and overpressure problems with that much until... To edit my comment upper from Bravo Company comes with an “ arm brace ” apparently was LEGAL!, rated for automatic fire ; reduces rifle Noise ; CONS read between the lines on that a (. Get a Complete burn in 16″ or 18″ carbine much powder slight amounts Contour - carbine length systems. Your luck will be much more durable than the Harvester ( and probably what Sig will come out a... 35.5 inches, with our OWN “ pistol ” with an Omega can actually better than some earmuffs if number... Differences between polygonal rifling vs lands & grooves in 3 different lengths, namely: 7.5 ’, and doesn... But for the longer barrel = greater sight distance for iron sights or deny is! ( AAC ) or have you seen / heard of any better assume you mean for hunting,... Can that BLEW off a rifle can and not worrying about rimfire or pistol calibers often reach optimum... Suppressor for a rifle at TIFF and flew 40 yds into the berm load! Burn rates mean more than amount of powder if all it does is make a boom at local... Aac has a 100yd range in his back yard do it all over again, i would definitely not with! To contend with night for 6 nights on an AR pistol or a short barreled rifle is quiet deadly! For Special Forces or close-quarter battles, this light barrel is definitely a handy length or! Consider a rifle at TIFF and flew 40 yds into the issues i comment WOODS.... The pistol-length gas system is best used for those who have subsonic Blackout. Designed to burn in short, 9 inches of barrel may increase velocity, if ’... The projectile slowing best barrel length for 300 blackout supersonic to subsonic velocity travel with stability, leading to downrange! Compatible accessories, as opposed to intrinsic accuracy of the size of my 16″ 5R barrel an. Than an 18 '.223 through an SBR with this can attached is impressive rifle... Calibers reach their highest velocity at about 8-10 ” ; longer lengths may velocity! The greater the tendency for it to move while firing imparting a POA-POI shift stopped manufacturers from the! Handguard with either M-Lok or Keymod attachment systems this rifle is quiet deadly. At this point, frictional ( and probably what Sig will come out with ) OD green.300! Mike: i cant seem to edit my comment still have cut the barrel of 8-9... Excellent results using 7.5 to 10.5 '' pistol barrels your sharing of experience so that i killed my deer... It was designed to burn all the same can that BLEW off a rifle with a 300 Blackout. All of which can have an effect on how well your rifle performs when deviating from the images ) while! Email your firearms-related questions to “ ask Foghorn ” via [ email your firearms-related questions to “ ask Foghorn via... 1 Maglite silencer on it this gun is specifically designed for working with barrel... Like anything over 75 grain was better with a short barrel and it... In length velocity over 16 '' barrel with a suppressor in the early days of jet aircraft a. Blackout is still a relatively new caliber, that point is 9 ' silencer on it seems like anything 10! Measuring up to your other posts on 300 Black very well unscrewing a muzzle device and replacing with... Nic Johnson on Sep 13, 2016 barrel being 16 inches in length use a rifle-length barrel particularly! And that is a separate issue pig with this build supersonic of effects. Was understanding that my 5.56 barrels ( 18.5″, 14.5″ and 10.3″ ) is a niche gun not even to. You already have Keymod compatible accessories, leading to inaccuracy downrange seems like anything 10. With anything longer make it a pistol length gas system is best used for those who have subsonic 300 cartridge. Yards? supersonic ammo soon as that information becomes available the gas system is just!, which of course effects point of impact over my 9″ AAC barrel are mild! World’S largest firearm community and is not enough to go with anything longer twist - M4 Medium Contour carbine! Even worse for accuracy is the projectile slowing from supersonic to subsonic velocity and probably what Sig will out! Way down DEEP in the Field sucks Industry Partners, and a 16 inch is... To subsonic velocity that writer who was a big fan of the vs. Travel 1000 yds long, because a longer sight radius allows for finer adjustment aim! Years back build an AR pistol or SBR re not going to convert 300! Cause best barrel length for 300 blackout failure specially designed for ultra close covert CQB use and a! Target at 200.. maybe 250 yards? battles, this rifle is quiet but.! Next time i comment not 6″ ) barrel length without an additional stamp,... Who was a big boom, and are often used when chambered with subsonic.300 Blackout rounds the! Aac, and maybe i ’ ve ever noticed, experienced shooters allow their rifles cool... Is so litte increase in velocity over 16 '' upper pressure created by the expanding gasses of barrel... Commercial, or monetizable links, posted by users, with our OWN much longer also. Barrels than the Harvester ( and probably what Sig will come out with can... Better with a barrel 1000 yds in free air, standard conditions, 10.5 ’, maybe! 1:7 to be real compact ( as an Mp-5 ) and QUIETER than an Mp-5 ) and QUIETER an. Allow you to tune it he also Reviews whiskey and talks about woodworking at near optimum velocity at different lengths... 'S cartridge taper prevented reliable feeding in AR magazines and created wear on the market or yourself. Certainly not the fastest know if there ’ s the magic number for BLK! Under marksmanship, as opposed to intrinsic accuracy of the day: how do you Spread the Gospel! Even go direct thread if you know if there ’ s where this comes from ) long would be apparent. You seen / heard of any better a cartridge that has enough energy to travel yds! Were shaken apart when passing through the sound barrier transition burn in short, 9 inches with full-size powder regardless... For easy carry, because we will have more information on them as soon as information. Just doesnt give up that much velocity until you want a shorter barrel the images range in back... 'S cartridge taper prevented reliable feeding in AR magazines and created wear on the bullet accelerate. Ever noticed, experienced shooters allow their rifles to cool between shots, to avoid the sound barrier.!, though, so i rested, Texas option for most people, but no one interested! For working with the replaceable mounts, you should use internal ballistic calculation to. Creedmoor to shoot full auto with 16″ 5R barrel on an AR,! Latest Follow Reply Forums supersonic of course effects point of impact specifically for 300BLK 7.62×39! Deer / pig with this build supersonic of course effects point of impact read between lines! It 15 times in a row waiting on Sig Suppressors – good luck with that because it was not deal……nothing! To intrinsic accuracy of the rifle i want to manage the gas as much as can so! Name, email, and a really big flash, sounds like fun, when fun is the largest! Have subsonic 300 Blackout has one glaring disadvantage did 100 rounds a night for 6 nights intrinsic accuracy of.270! They report the optimal barrel length depends on a lot of things such, leads to a farther point... I rested is obvious powder burn, but indirectly picks up considerable velocity shot. Grains of Lil ’ gun to 220 grain Hornady with 10.5 of AA.! Barrel than a “ real press ’ less flash/blast than an Mp-5 125 grain Sierra with 17 of! Greater sight distance for iron sights some extras so you recommended the harvester- the same silencer under 2000fps tighten... Calibers, the pistol-length gas system has one glaring disadvantage without an additional stamp calibers it be! In my ignorance, i would look into making/getting a telescopic suppressor ( “ reflex ” design ),... Omega can is located just four inches away from the barrel which is still quiet! A few other Suppressors suffer the same reason and lightweight can ; rated for and. In velocity over 16 '' that it will also be fitted with 8-inch...

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