J&B Firearm Sales
Sporting Systems
Bear Creek Arsenal
Oregon Rifleworks
Southwest Firearms
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 an intermediate 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. 300 BLK ammunition cannot be used in a rifle chambered for 7.62×40mm Wilson Tactical.

View More On Wikipedia.org
Recent contents
  1. G

    300 Blackout Parts Set

      1. For Sale
    • Milwaukie
    • Oregon
    For sell is a AR-15 Rifle Parts set in 300 Blackout. Every part to assemble a rifle except a lower receiver or magazine. Included is a Geissele 2 Stage (G2S) Trigger, a $170.00 trigger. The upper receiver is an older Side Charging Bear Creek Arsenal receiver that does not have a charging handle...
  2. Vernonia MW

    Machining a custom AK barrel in .300blk

    This past week, I wrapped up and shipped off a pretty neat project. Customer requested a custom barrel that mostly replicated a polish Tantal, except 14.5" long, no front sight, threaded muzzle, and chambered in .300 Blackout. He shipped me the barrel he wanted dimensions pulled from, and I...
  3. Rob86

    .300 blackout Bolt action rifle

      1. Want to Buy
      2. Want to Trade For
    • Canby
    • Oregon
    Update: I have been offered a rifle to buy. Assuming that works out I will no longer be in need. Thanks Hello, I'm looking for a .300 Blackout bolt action rifle with a threaded barrel. Might also be interested in a higher end .300 Blackout AR upper. I have a bunch of trade options or may be...
  4. unionguy

    Winchester .300 AAC Blackout 200 grain subsonic REDUCED PRICE

      1. For Sale
    • $250
    • Gladstone
    • Oregon
    Winchester .300 AAC Blackout 200 grain subsonic for sale. A total of 330 rounds. Online prices look to be at 90c per round, plus shipping often. All yours at 65c a round and no shipping, only $200. Will come in ziplock mags or I can dump them from my ammo can to your preferred container at the...
  5. J

    Savage 300 blackout barrel and bolt

      1. For Sale
      2. For Trade
    • $400
    • Hillsboro
    • Oregon
    Brand new savage 300 blackout barrel. 16.5” small shank barrel. Threaded 5/8-24. Complete savage bolt to go with it. Bolt is used. Got for a project I never went through with. All you need is a short action savage action and you’re all set. Asking $400 obo or trade for pistol red dot or ammo...
  6. outontherange

    AR15 300 AC Blackout 16inch 1/7 twist

      1. For Sale
    • $750
    • Portland
    • Oregon
    All new. CMMG barrel 1/7 twist, F1 handguard, Magpul front flip site, Seekins billet upper, gas tube and low profile block. Used. Aero lower, Colt Half moon bcg, NC Star scope with detachable handle, and titanium flash hider. Complete rifle just needs to have barrel assembled to upper. Comes...

  7. Q Cherry Bomb muzzle brake

      1. For Sale
    • $85
    • Coulee City
    • Washington
    For Sale Q Cherry Bomb muzzle brake, 5/8x24 thread pitch, 7.62mm bore Description from LiveQorDie.com Originally purchased with the intention of getting a Q Trash Panda or Thunder Chicken for a .300 Blackout AR-15 pistol. Went with another brand so no longer need this brake. Like New. $85.00
  8. P

    DD .300 BLK upper w/ ammo lower price

      1. For Sale
    • $500
    • Beaverton
    • Oregon
    This is. .300 Blackout upper with approximately 40 rounds fired through it -Daniel Defense upper receiver -CMMG 1:8" twist barrel. Melonited finish. 16 inch. -Full auto bolt carrier and bolt, with charging handle (Brownells?) -Daniel Defense Omega X 9.0" railed hand guard -Magpul Rail Light...
  9. outontherange

    Cmmg blackout on Seekins upper 16

      1. For Sale
    • $550
    • Portland
    • Oregon
    Brand new upper in 300blackout. Has Seekins upper with CMMG barrel carbine gas system. Comes with 60 rounds of new ammo. Titanium flash hider. No bcg. Oregon sales only. No shipping.
  10. 7

    300BLK 10.5" Pistol and Reloading Package Deal ((Make offer))

      1. For Sale
      2. For Trade
    • $1495
    • Tigard
    • Oregon
    If you've wanted to get into this caliber, here's just about everything needed to get up and running right away. 10.5" 300BLK pistol with Holosun 503G-ACSS optic, 400 rounds fired. Includes a second matching upper, still new in-box. Includes 4 Lancer 300 BLK stamped mags and some other...
  11. PowPowPowers

    Aero Enhanced Handgaurd 15", Wilson Combat Recon SS Fluted 16" 300 Blackout Barrel

      1. For Sale
    • $200
    • Happy Valley
    • Oregon
    Hello, Up for sale are an Aero Enhanced Handguard, and Wilson Combat Barrel The Area Enhanced Handguard is 15" in length, and only fits an aero enhanced lower or their special barrel nut, which is not included because I lost it unfortunately. The Wilson Combat Barrel: It has less than 100...
  12. metalhead68

    Incomplete Aero .300 blackout

      1. For Sale
    • $650
    • Sheridan
    • Oregon
    Another project I started and lost interest in. Aero M4 lower with Giselle trigger set, hogue grip , Aero enhanced upper with 9" handguard. Comes with two Ballistic advantage barrels, 10" and a 16". 2A armament adjustable gas BCG. Carbine buffer tube/spring and adjustable brace. Also included...
  13. Userone

    1 LB of CFE BLK

      1. For Sale
    • $35
    • Bremerton
    • Washington
    1 lb of CFE BLK purchased Spring of 2022 I intended on using it for 300 blk supers but ended up using lil gun since I got it in bulk 35 f2f Sorry no trades Pm me with any questions
  14. dmmv

    Vltor MUR (sold)

      1. For Sale
      2. For Trade
    • $180
    • NW Portland
    • Oregon
    Vltor sold
  15. bmiller21

    300 BO supersonic

      1. For Sale
    • $140
    • Monmouth
    • Oregon
    Also willing to make trades for Glock magazines, preferably around 30 rd capacity
  16. TylerRitts

    10.5" Complete 300 black out

      1. For Sale
    • $500
    • Eugene
    • Oregon
    10.5" 300 blackout pistol PSA .300 blackout upper Milsport complete lower Shockwave Gen 2 brace Wilson Combat extended bolt release 1 30 round hex mag 30 rounds of mixed .300 blackout Only shot about 50 rounds through it. It cycles and functions perfectly. Some very very minor scuffs from...
  17. TylerRitts

    10.5" .300 black out

      1. For Sale
    • $550
    • Eugene
    • Oregon
    10.5" AR-15 pistol chambered in .300blk. Features a US made Palmetto State Armory complete upper and a US made Milsports lower. It has a Shockwave Technologies Gen2 Blade brace that's also made in the US. I have ran about 100 rounds through it and it shoots very well and very smooth. If...
  18. PNguyen

    Ruger American Ranch .300 Blackout

      1. For Sale
      2. For Trade
    • $550
    • Tacoma
    • Washington
    Brand new, haven't put any rounds through it yet. This is the updated version that takes AR style mags. Will come with original box, papers and 10rd pmag. Open to trades for other rifles, optics, or 7.62x39 ammo. Not interested in handguns. Meet at any Pierce county FFL, buyer pays fees...
  19. dmmv

    300blk Upper for sale

      1. For Sale
      2. For Trade
    • $850
    • NW Portland
    • Oregon
    16” 300 blackout upper
  20. NW PREPPER

    Palmetto State Armory 8.5in .300 AAC Complete Upper

      1. For Sale
    • $575
    • Rockaway beach
    • Oregon
    This is a 8.5in barrel with a 10.5in handguard. Less than 100rds through it. Includes the following: Charging handle Bolt carrier group Vortex Sparc II Red Dot Magpul sling mount Magpul angled foregrip *Does NOT include mounted optic or flashlight.
Cerberus Training Group
Southwest Firearms Forum
Bear Creek Arsenal
Sporting Systems
Back Top