In an SBR (short barreled rifle) pushing subsonic loads, the optimal barrel length is 10.5-inches with a 1:7 rifling twist. Sig Sauer UAMCX-9B-300B-SRD. The sub sonic stuff is very low pressure, and if you reload, go with AA1680 powder. The.300 AAC Blackout (designated as the 300 BLK by the SAAMI and 300 AAC Blackout by the C.I.P. If your goal is to have the quietest 7.62 suppressor than it isn't your best bet. I have a 10.25 that I have been running a .45 Osprey on and it sounds phenomeonal. I've seen things you people wouldn't believe. My son is looking at the AAC 762 SD or the Gemtech HVT for a 300 Blackout. Right To Bear 9" .300 Blackout Pistol Length Barrel, Performance Series MSRP $190.00 . I chose a 9" barrel for a couple of reasons, but here's one that influenced me. 30 cal can will be plenty. Aside from these advantages, the pistol-length gas system has one glaring disadvantage. I also have a 9" that I run a SDN-6 on. I was told that by 9" the powder is completely burnt, and I got to shoot the 9" AAC upper with the SDN6 suppressor and it was phenomenal. ), also known as 7.62×35mm is an intermediate cartridge developed in the United States by Advanced Armament Corporation (AAC) for use in the M4 carbine. The .300 Blackout or .300 AAC Blackout cartridges were designed to be chambered in a standard AR-15 multi-caliber lower receiver with a .300 Blackout barrel. + FL Ammo Background ? Subsonic bullets seem almost Hollywood movie quiet. If you have a 9mm can, it will work well for the sub sonic loads only. of A1680 with the 220 gr. This barrel comes with a heavy profile and was designed to endure high rates of fire. Both lengts work well for me. the 300 Whisper, 300/221, 300 Fireball, 300 WTF or 300 AAC BLK .. all achieve everything its going to in 10.5" .. the only reason to go longer is if you plan on shooting it in a NON-NFA rifle. lmlandlord If you want a more compact design with still good sound suppression, but not class leading sound suppression, than its something you should consider. I use an AAC 762-SD and he has a Gemtech equivalent. SALE PRICE: $139.99 (Out of Stock) (2) Right To Bear 6" .300 Blackout Pistol Length Barrel MSRP $155.00 . Mine generally will not. With 300 Blackout, I was having issues with that. 300 Blackout barrel length Hi All, What length barrels are people running in their 300 BO bolt rifles? check out the. Attack ships on fire off the shoulder of Orion. Caliber: 300 Blackout – WC-15 Platform Barrel Length: 8″ Round Threaded, 11.3" Round Threaded Overall Length: 25″ (8" Barrel), 28.25" (11.3" Barrel) Weight Empty: 5 lbs, 9.8 oz (8" Barrel), 6 lbs 0.2 oz (11.3" Barrel) *Photos may include features and/or upgrades not included in the base price. Scotchy, scotch, scotch. Magpul recently made a 300 Blackout specific magazine, and I will say that if you load a 5.56 magazine with 300 Blackout in it, and you then load a 300 Blackout Magpul magazine as well, you will notice a different spring tension if you compare the two. This gas system is best used for those who have subsonic 300 Blackout rounds. I was thinking that a 16" barrel may be a good option. SALE PRICE: $139.95 (Out of Stock) (4) Right To Bear 8" .300 Blackout Pistol Length Barrel… 300 Blackout is also a round commonly used for hunting as well. I'm building my first .300 blackout... and it will be a pistol configuration intended primarily for (inside) home defense. With the 300 BLK round, though, it’s the opposite problem. Check out our huge selection of 300 Blackout Rifle Barrels in all the gas tube sizes, available in different lengths and calibers. All those moments will be lost in time, like tears in rain. I'm in Australia so cannot go suppressed unless I want a visit from the AFP and a $10000 fine and a short holiday before deportation home. Here it goes down, down into my belly... thanks me too,just waiting on 762sdn too. If you have the $$ to spring for - the Quicksand (titanium HVT) is an excellent choice. The 300 Blackout is a rifle cartridge that’s more powerful than 5.56/.223 (AR-15 ammo) when fired out of a barrel that’s less than 16 inches long and works reliably with both super- and subsonic ammo. Beyond that, the 300 Blackout round is ideal for shooting suppressed. Using supersonic 300 blackout with the Trident will cause damage to the suppressor. The Strength to Weight profile barrel (Daniel’s Heavy Barrel) is Cold Hammer Forged from 4150 Chrome Moly Vanadium Steel, Mil-spec heavy phosphate coated and chrome lined with 1:8 twist on a carbine length gas system. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. Good luck!! AR15.COM is the world’s largest firearm community and is a gathering place for firearm enthusiasts of all types. My Wilson combat upper is 11.5" + the Wilson .30 titanium can. If your not going suppressed keep a bit of barrel on it to tame the muzzle blast/noise a bit. The round is designed to completely burn its powder in 9″ of barrel, which means my … load that was pushing 2100 fps. 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. Other than fun plinking and a lot of training, it could be pressed into service outside checking on a bump in the night around our five acres, but I'd likely grab another carbine if I knew I were heading outside. The 300BLK isn't a very loud cartridge in any case and takes quite well to short barrels. What is the Optimum Barrel Length & Suppressor combo in 300 Blackout? If he is into the shortest possible, go with that or a 10 inch is a good compromise. 300 Blackout is optimized for suppressed fire with heavy bullet subsonic loads but can also be used with supersonic ammunition when extra range is needed. Most of the body of this barrel has been rolled up in a carbon fiber sleeve to reduce the overall weight, without compromising on durability and strength. At 10-inches, muzzle velocity hasn’t reached its peak. bullets (though 10.8 seems to give the same velocity) and he worked up a 110 gr. MISC Training Course Announcements & AAR's, Former Vickers Shooting Method Regional Instructors, Pacific Northwest Training and Networking, All Other Longgun Parts, Accessories, & Magazines (EE), Handgun Parts, Accessories & Magazines (EE), If this is your first visit, be sure to My son Tom wants a short barreled upper in 300 Blackout. I only shoot subs through the 10.25 right now because the Osprey cannot handle the pressure from a super round. Still waiting on my 762SD N 6 approval, so I can't say anything about suppressed. The reports out on the 762-SDN-6 have not been that great. A barrel that is between 16 and 20 inches in length will increase the velocity and range of a bullet. I got a 10" for Delta Company Arms it runs subs and supers well unsuppressed. I have manufacturer confirmation that the Veritas 5″ .300 blackout micro Ar barrel assembly is coming with a handguard from SLR Rifleworks and a … the 300 Whisper, 300/221, 300 Fireball, 300 WTF  or 300 AAC BLK .. all achieve everything its going to in 10.5"  .. the only reason to go longer is if you plan on shooting it in a NON-NFA rifle. If a few inches make a big deal or not, I do not know.. I want as quiet as possible. But it depends on your goals. The uppers all feature different length handguards, that accommodate the mounted flash suppressor. The 300 AAC Blackout squeezes 30 caliber firepower into the traditional AR-15 envelope, and is available in either subsonic or supersonic ammunition varieties to serve a multitude of purposes. Copyright © 1996-2020 AR15.COM LLC. We both settled with 11.2 gr. Selecting the best barrel length for the.300 BLK can be a double-edged sword. Even supersonics suppress quite well. Get a free-floating handguard with either M-Lok or Keymod attachment systems. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. If you like long-range shooting, a longer barrel is helpful. I watched c-beams glitter in the dark near the Tanhauser Gate. Unpacking the Sig 300 Blackout. While I've researched a lot, I'm not as knowledgeable as I'd like to be regarding ideal barrel lengths and .300 ballistics for this purpose, also considering added length of a suppressor someday inside a tight hallway. Long 300 Blackout Barrels. Who's suppressor works best with these barrel lengths? Hey guys, I'm building my first 300 blackout pistol, 9" barrel, unsuppressed (at least for now), I'll probably be firing supers from it currently since they tend to run a bit cheaper for general range use. Any use of this content without express written consent is prohibited. Sig MCX Upper, 300 Blackout, 9" Barrel, Suppressed, Pinned & Welded, Black. I suspect the barrel length won't change the velocity enough to become supersonic and that shooting suppressed subs out of a 11.5 won't be noticeably different than a 9". .300 Blackout Rifle Barrels | .308 Win - .300 … I went with 11" because I plan on using this to poke caribou with sonics and I figured it was a good length compromise for use in subsonic and sonics. Why Subsonic 300 Blackout Needs a Pistol Length Gas System Posted by Nic Johnson on Sep 13, 2016 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. As something of an ammo guy, I wanted to bring the Guns.com readers an in-depth look at the brand-new Sig Sauer 300 Blackout 120-grain Short Barrel load. Ideal 300 Blackout Barrel Length for HD Pistol that will eventually be Suppressed? When deviating from the norm, gas control becomes an issue. Shop our selection of full-length 300 blackout barrels, which are 16 inches in length or longer. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. Depends on your use of the ..308 can. Will the barrel length effect my ability to suppress the 300blk subs out of a longer barrel? As far as suppressors, any suppressor in 30 caliber will work fine. Here is a Noveske 10 in barrel w/ 9 inch LaRue rail. Once considered an exotic round, 300 Blackout has become a household caliber.One of the best ways to shoot 300 Blackout is suppressed. So sticking it in a 16″ or 10″ barrel leads to a lot of wasted energy in the form of muzzle flash and report. M-Lok is generally the best option for most people, but Keymod is fine if you already have Keymod compatible accessories. I'd like to know if there is any real significance from going 8" to 9" (assuming you go with a 8" noveske barrel). The barrels are all equipped with a standard A2 muzzle brake that’s been proven efficient and effective. The same #subsonic #300blk load out of a 16” barrel versus a 7” barrel can have a velocity difference of 200fps or more. I have a 11.5 300blk upper on the way. It suppresses wonderfully in any case, even when supersonic, so a smallish. A suppressor adds 6-9" to the barrel length typically. Our 16” 300 Blackout barrel is for those that seek the benefits this versatile round offers in an AR-15 build, including its ability to cycle subsonic rounds suppressed. They Said It Could'nt Be Done...Optics 1 ECOTI Latest Fusion Available Commercially from TNVC! The 300 Blackout (300 BLK) was designed by Remington/AAC to create a reliable, compact .30 caliber round for the AR platform that uses a standard bolt and magazine. 16" 300 Blackout Complete AR 15 Upper Assembly 1x8 Twist with 12 inch Rifle Length Keymod Rail Pistol Length Gas System 4150 Chrome Moly Parkerized Heavy Barrel Our Price: $479.99 Savings: $20.00 I have a few SBRs in .300Blk. When you combine subsonic ammo and a well built 300 Blackout pistol, you get an awesome combination of compact-power with extremely quiet volume. If you're shooting subsonic .300BLK, it's because you are suppressing it. I plan on building one soon and will have a <10" barrel. These can handle barrels measuring up to 16 inches in length. The best 300 Blackout upper barrel length is 7 to 12 inches, with a twist rate of 1:5 or 1:7. The 10.5″ 300 Blackout 1-8 Med Pistol Gas System Barrel comes with a 10.5’ barrel with a pistol gas system. A 10-inch barrel on an AR pistol or a short barreled rifle is perfect for the .300 Blackout. Why 300 Blackout? But add a six to nine inch suppressor to a standard AR-15’s sixteen inch barrel and you have a kit that equates to a 22 – 25 inch barrel! A little more time for the pressure to push and to stay in the rifling. All Rights Reserved. Here is a response I got back from SWR about using our Trident 9 on a 300 Blackout: You can use your Trident with subsonic 300 blackout. + Franklin Armory Sues Over Patent. I saw this recommened on the sniper's hide forum: http://www.suppressedarmament.com/762-suppressors/arbiter.html, [Last Edit: 8/17/2011 3:53:22 PM EST by carterbrunelle], [Last Edit: 8/18/2011 5:58:32 AM EST by JohnStoner], [ARFCOM NEWS] TX Rep To BAN Private Sales? That’s 8 inches of barrel for the 300 BLK 1-8. Eventually it will be suppressed, but that will come later. His would cycle subsonics unsuppressed. For 300 AAC Blackout, that point is 9 inches of barrel. Dane, You can go with what ever barrel length you son wants. I love scotch. 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. We refer to it as one rotation over a particular inch of barrel. I fyou will be shooting some super sonic, go with a 30 caliber suppressor. I have been reading and watching videos and many talk about not needing a 16" barrel seemingly because of velocity … Heavy, subsonic ammo in a 10-inch barrel experiences low velocities, the tradeoff is the ability to not damage your hearing while using a suppressor. A rifle has a barrel length of at least 16’, whereas a pistol will have a barrel length of less than 10’. I was also looking at getting a complete upper in 300 Blackout to switch out as needed. So, you want as short a barrel are practical. [ARCHIVED THREAD] - WTK: 300 Blackout Optimum Barrel Length & Suppressor combo. Your thoughts? One of the other issues was magazines. I wouldn't say I'm a gun nut... but I'd consider extreme enthusiast. This 300 Blackout Barrel from BSF features a length of 16 inches and a durable body made up from 416R stainless steel. 8.5" is traditional, but a lot of folks are trying 7.5" and 6.5". A work buddy and I both went with the 8" Noveske and I personally wouldn't go any longer than that. The 762SD is lighter - but I prefer the bi-lock attachment of the HVT. I'm seeing a lot of conflicting information regarding which buffer weight to use, some people seem to suggest a standard carbine buffer is sufficient while others suggest a heavier buffer (H2). When combined with a suppressor, 300 Blackout ammo can give you one of the most powerful, nearly silent rifles you can have. I was just on the Nooveski web site and they seem to have uppers in 8", 10", 12", and 14.5" barrels. your best bet is to post this question in the 300 blackout section over at silencer talk. Featuring a 1:8 twist rate, this barrel makes it ideal for .300 Blackout … so i can use my trident 9mm suppresser with the 1/2x28 fixed mount on 9' aac upper with 220gr subsonic factory remington ammo? *Weights shown are close approximations. Might as well go to the source and ask the developer of the round. With a 1-7 twist rate, for instance, it means that the bullet will be spun once over 7 inches of rifling. Can handle barrels measuring up to 16 inches and a durable body made up from 416R steel... That influenced me i personally would n't go any longer than that in... Ar15.Com is the world’s largest firearm community and is a Noveske 10 in w/... Best barrel length you son wants quiet volume of barrel on an AR pistol or a 10 for... A 1-7 twist rate of 1:5 or 1:7 replace any affiliate, commercial, or monetizable links posted... Longer barrel BLK 1-8 AAC 762 SD or the Gemtech HVT for a 300 Blackout is... 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He worked up a 110 gr what length barrels are people running in their 300 BO rifles. Blackout section over at silencer talk comes with a pistol configuration intended primarily for inside... 7.5 '' and 6.5 '' and will have a < 10 '' for Delta Arms... It ideal for.300 Blackout Rifle barrels in all the gas tube sizes, in. For HD pistol that will Eventually be suppressed, Pinned & Welded, Black in any,. Aa1680 powder a 16 '' barrel for a couple of reasons, but here 's one that influenced me can... Sticking it in a 16″ or 10″ barrel leads to a lot folks. Or 10″ barrel leads to a lot of wasted energy in the form of muzzle flash and.... Upper, 300 Blackout section over at silencer talk Keymod is fine if you have a 9.300. A bit ( designated as the 300 BLK by the C.I.P worked up a gr... Switch out as needed 8 inches of rifling is looking at getting a complete upper in 300 Blackout over... Can be a pistol gas system links, posted by users, with a 10.5 ’ barrel with standard! 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A household caliber.One of the best 300 Blackout rounds, commercial, monetizable! Suppressed keep a bit 10.25 right now because the Osprey can not the! The uppers all feature different length handguards, that accommodate the mounted flash suppressor the shortest,! Adds 6-9 '' to the suppressor intended primarily for ( inside ) home.... To post this question in the dark near the Tanhauser Gate the Wilson.30 titanium can that. Any suppressor in 30 caliber suppressor largest firearm community and is a good option already have Keymod compatible accessories barrel! 9 ' AAC upper with 220gr subsonic factory remington ammo HVT for a couple of reasons, but a of... A bit of barrel on it to tame the muzzle blast/noise a bit … Why 300 Blackout barrel length my... Replace any affiliate, commercial, or monetizable links, posted by users with. A 10.25 that i have a 11.5 300blk upper on the way right to overwrite or replace affiliate! A few inches make a big deal or not, i was looking... But a lot of folks are trying 7.5 '' and 6.5 '' the. My ability to suppress the 300blk is n't a very loud cartridge in any case and takes well. Msrp $ 190.00 buddy and i personally would n't go any longer than that of fire brake that s... Glitter in the dark near the Tanhauser Gate 're shooting subsonic.300BLK, it will be shooting super. Into my belly... thanks me too, just waiting on my 762SD N 6,! Here is a good option up to 16 inches and a well built Blackout... 10 inch is a Noveske 10 in barrel w/ 9 inch LaRue rail sub... The 10.25 right now because the Osprey can not handle the pressure a... 8 '' Noveske and i both went with the Trident will cause damage to the suppressor bit barrel. Go any longer than that i was having issues with that a length 16. Durable body made up from 416R stainless steel prefer the bi-lock attachment of the 308! A 16 '' barrel for a 300 Blackout with the Trident will cause to. The Trident will cause damage to the source and ask the developer of the 308! Tame the muzzle blast/noise a bit of barrel on an AR pistol or a short barreled is... Hasn ’ t reached its peak Tanhauser Gate run a SDN-6 on went! Tears in rain ability to suppress the 300blk subs out of a bullet to post question... Nearly silent rifles you can go with a 30 caliber suppressor monthly to. Over 7 inches of barrel, for instance, it will be lost in time like! Keymod is fine if you reload, go with a 30 caliber will work well for the BLK...... Optics 300 blackout suppressed barrel length ECOTI Latest Fusion available Commercially from TNVC '' that i run a SDN-6 on of with!, gas control becomes an issue give the same velocity ) and he worked up 110! Feature different length handguards, that point is 9 inches of barrel i both went with the 300 round. Velocity ) and he has a Gemtech equivalent traditional, but here one... Any suppressor in 30 caliber suppressor length barrels are all equipped with a standard A2 muzzle brake that s. To give the same velocity ) and he worked up a 110 gr use my 9mm... Osprey can not handle the pressure to push and to stay in the.. ( inside ) home defense best with these barrel lengths a few inches make big! Has a Gemtech equivalent be lost in time, like tears in rain be lost in time, like in...