HighLine Firearms
Sporting Systems
Bear Creek Arsenal
Southwest Firearms Forum
J&B Firearm Sales
Bi-Mart
Oregon's Indoor Shooting Range
JavaScript is disabled
Our website requires JavaScript to function properly. For a better experience, please enable JavaScript in your browser settings before proceeding.

  • Join the #1 community for gun owners of the Northwest

    We believe the 2nd Amendment is best defended through grass-roots organization, education, and advocacy centered around individual gun owners. It is our mission to encourage, organize, and support these efforts throughout Oregon, Washington, Idaho, Montana, and Wyoming.

    Free Membership Benefits

    • Fewer banner ads
    • Buy, sell, and trade in our classified section
    • Discuss firearms and all aspects of firearm ownership
    • Join others in organizing against anti-gun legislation
    • Find nearby gun shops, ranges, training, and other resources
    • Discover free outdoor shooting areas
    • Stay up to date on firearm-related events
    • Share photos and video with other members
    • ...and much more!

300 blackout

The .300 AAC Blackout (designated as the 300 BLK by the SAAMI and 300 AAC Blackout by the C.I.P.), also known as 7.62×35mm is a carbine cartridge developed in the United States by Advanced Armament Corporation (AAC) for use in the M4 carbine. Its purpose is to achieve ballistics similar to the 7.62×39mm cartridge, or even more similarly, the 7.92×33mm Kurz cartridge in an AR-15 while using standard AR-15 magazines at their normal capacities. Care should be taken not to use 300 BLK ammunition in a rifle chambered for 7.62×40mm Wilson Tactical.

View More On Wikipedia.org
Recent contents
  1. dsteve

    Arak-21 556/300BLK

      1. For Sale
    • $1500
    • Washougal
    • Washington
    I have for sale and a r a k - 21 chambered in 556 and includes a 300 blackout barrel quick interchangeable, sand tan lower with upgraded elf trigger magpul furniture, vortex 2 optic red dot. Includes three AR mags, 300 rounds of 300 blackout, $1,500 firm
  2. McShooter420

    EDITED: Bushmaster .300 Blackout with 5 mags and 200rnds of brass ammo

      1. For Sale
      2. For Trade
    • $1000
    • BRUSH PRAIRIE
    • Washington
    Wanting to trade or sell my blackout DM me for more details ALSO COMES WITH 5 MAGS AND 200RNDS
  3. J

    .300 BLACKOUT 90 Rounds Fiocchi, PPU HP, Sellier & Bellot Cheap

      1. For Sale
    • $70
    • Portland
    • Oregon
    Hey everyone, for sale is 90 rounds of .300 blackout ammo. 50 Rounds of Fiocchi FMJ, 20 rounds of PPU Hollow Point, & 20 Rounds of Sellier & Bellot FMJ. Found these lying around and don't have a firearm capable of shooting them currently. If you have any questions please comment below. I've...
  4. itzonlysmellz

    300 Blackout 125gr 320rds

      1. For Sale
    • $300
    • Beaverton
    • Oregon
    Selling 320rds of 300 Blackout (125 gr, FMJ, supersonic, brass case). They come in individual boxes of 20rds. I have 16 boxes for a total of 320rds. Selling each 20rd box for $20, or all 320rds for $300. Thanks
  5. _torque_spec_

    300 BlkOut Upper / Balistic advantage / Noveske

      1. For Sale
    • $400
    • Southern Oregon
    • Oregon
    Standard M4 Upper receiver 8.5" Ballistic Advantage 300 Blackout barrel Noveske NHR 9" handguard VSeven titanium Helios linear comp Standard Charging handle NO BCG Has maybe 50 rounds through it. Has a couple tiny scratches on receiver. Asking $400
  6. G

    300 Blackout (AR15)

      1. For Sale
      2. For Trade
    • $695
    • Portland
    • Oregon
    This has been a good rifle, but I'm looking for something I can take on a hiking trip. This is a reliable rifle, and it should goto someone who will put it to use. The barrel can easily be switched out to fire 5.56. Rifle comes with .300 AAC rounds.
  7. Hueco

    Integrally Suppressed Bolty 300blk...?

    This guy hit my email this morning: (https://www.bauer-precision.com/b-t-spr300-pro-integrally-suppressed-rifle/) And, besides the fairly cool factor going on here...and the ridiculously small package this would be folded and taken down...I just can't fathom why I'd want one. What am I...
  8. ukcatman

    Like new complete Anderson 5.56/.223/300Black BCG

      1. For Sale
    • $100
    • Redmond
    • Washington
    Like new complete Anderson 5.56/.223/300Black BCG Approximately 100 Rounds fired with it and it works perfectly. Just decided on doing something different and so I've taken that build apart. This is the unit: https://andersonmanufacturing.com/packaged-bolt-carrier-group-assembly-ar15.html...
  9. Tick Licker Firearms

    Aero Precision 300 blackout with vortex crossfire scope (Used)

      1. For Sale
    • $999
    • corvallis
    • Oregon
    This is a consignment firearm. Aero precision upper and lower with a keymod handguard and a vortex crossfire 3-9x40 scope. Button safety, extended mag release, and a hefty rubber grip will make this the perfect 300 blackout for diving right in. Tick Licker Firearms Corvallis is located at 1880...
  10. J

    BCM MK2 16” 300 blackout w/ Geiselle trigger and Aimpoint pro w/ hundred rounds of supers.$1150

      1. For Sale
      2. For Trade
    • $1150
    • Portland
    • Oregon
    BCM MK2 upper with BCM bcg and lower i added a Geiselle ssp trigger and a rugged muzzle break. Rifle has less then 100 rounds through it. Local transfer preferred in Portland area. pictured with scope but I’d do a like new aim point pro with it. $1150
  11. S

    Nikon P300 super sub

      1. Want to Buy
    • SPRINGFIELD
    • Oregon
    WTB Nikon P300 super sub with mount preferred but just scope is good as well let me know what you want for it
  12. shakilloatmeal

    282x Sierra .308 240gr smk’s

      1. For Sale
      2. For Trade
    • $140
    • Damascus
    • Oregon
    I bought these off another member on here a few months ago while I was preparing for my new 300 Norma but I’m gonna stick with the 199gr Hammer Hunters for this rifle, so I can let these go if anybody is interested. There’s 282x of them all same lot number they are from a 500 count bulk box that...
  13. S

    Ar 15 300black out and ar15 556

      1. For Sale
      2. For Trade
    • $2500
    • Chehalis
    • Washington
    Looking to sale or trade both my ar 300 blackout and my 556 both have 150 rounds and the 300 has 2 ten round mags an a 35 and 45 round mags the 556 has two 35 round mags they come with scopes and laser sights and other add ons both in great shape looking to sale them or trade for other firearms...
  14. D

    300 blackout and 556..

      1. For Sale
    • $1
    • Foster
    • Oregon
    Wondering if this is a good deal (see pics)
  15. 762x39

    300 Blackout 75 Commercial Once Fired Brass – Polished

      1. For Sale
    • $15
    • Newberg
    • Oregon
    I have 75 mixed head stamp Commercial 300 Blackout Once fired brass, polished. No reformed ones. $15 Willing to ship USPS priority mail if you add $8.90
  16. FatBob97424

    Wanted Stripped Aero M4E1 Lower and NiB BCG

      1. Want to Buy
      2. Want to Trade For
    • Cottage Grove
    • Oregon
    Looking for a stripped Aero M4E1 Lower receiver in black for a pistol build. If you have one for sale or know where I could get one please let me know. Also looking for an Aero or Ballistic Advantage or Fail Zero FA NiB 5.56 / .300 AAC BO BCG. I have cash and/or some steel core 7.62x39mm ammo...
  17. 762x39

    300 Blackout 60 plus Once Fired Brass – Polished

      1. For Sale
    • $10
    • Newberg
    • Oregon
    I have 60+ 300 Blackout, Once-fired, mixed head stamps. $10. Willing to ship if needed.
  18. J

    .223 & 5.56 for your 300 Blackout Subsonic

      1. For Trade
    • Bothell
    • Washington
    Willing to trade .223 or 5.56 FMJ for 300 BLK Subsonic FMJ. Willing to value respective rounds at a fair price for the trade.
  19. SIG34

    300blk once fired Brass (208rds)

      1. For Trade
    • $1
    • Monroe
    • Washington
    208 pieces of brass 132x S&B brass 38x Hornady brass 38x Federal brass Will trade for 1 box of factory subsonic 300blk ammo *
  20. SIG34

    SIG MCX Canebrake 300blk (Wanted)

      1. Want to Buy
    • Monroe
    • Washington
    SIG MCX Canebrake (FDE) 300blk Also looking for a 9in mcx (FDE) cash in hand! name your price!
Cerberus Training Group
Midway USA
Southwest Firearms Forum
Brownells
Sporting Systems
Oregon's Indoor Shooting Range
Collectors West Gun Shows
Optics Planet
Bi-Mart
Bear Creek Arsenal
Back Top