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300blk

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 rifle 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 Soviet cartridge in an AR-15 while using standard AR-15 magazines at their normal capacity. Care should be taken not to use 300 BLK ammunition in a rifle chambered for .223/5.56 or 7.62×40mm Wilson Tactical.

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Recent contents
  1. Big-Tex

    Ruger Mini-14 300blk

      1. For Sale
    • $949
    • Bend
    • Oregon
    Bought this to be different, I didn’t want another AR platform, but it’s just not doing it for me. Runs supers just fine, but subs are finicky. Includes 4 factory magazines, Samson scout rail with T-1 mount. Currently has a Holosun ARO green dot mounted, this will be included because it...
  2. itninja

    Primary Arms SLX 3x32mm Gen III Prism Scope ACSS-300BLK/7.62x39

      1. For Sale
    • $200
    • Bellevue
    • Washington
    Open box, never mounted but has been removed from its packaging before. Perfect condition. The Primary Arms SLX 3x32mm Gen III Prism Scope is a high-quality optic designed for hunting and sporting activities. It features a multicoated lens with a red reticle, offering a fixed magnification of...
  3. ASH503

    Single shot 300blk ar15 upper

      1. For Sale
    • $400
    • Eugene
    • Oregon
    Selling my 300 blackout upper. No gas block or tube, so very quiet with no reciprocation when fired. Manually cycles with the side charging upper. Parts: Solo 300 barrel Griffin armament linear comp eBay round knurled handguard Gibbz g4 side charging upper Primary arms 2x prism Asking $400...
  4. Gigatar

    Done  Winchester 300BLK 200gr Subsonic @ Bimart

    I saw that the Newberg Bimart had about 6 boxes left of Winchester “Super Suppressed” 300blk 200gr Open Tip - Range Subsonic for $14.95/20rd box. Haven’t seen that available for a while.
  5. Spec.-K

    Brand New Ballistic Advantage AR Barrels- 300BLK

      1. For Sale
      2. For Trade
    • $100
    • Kelso
    • Washington
    I'm needing to thin the herd a little...😅 I've got some brand new barrels that didn't quite make the cut for my custom build plans, so hopefully someone here can give them a good home. ☺️ BA 300BLK 16" pistol gas $100 BA 300BLK 9" pistol gas $80 Trade value a tad bit more. Contact me for...
  6. KrazyRedhead

    MULTI-CAM BLACK PISTOL ACCESSORIES

      1. For Sale
    • $340
    • Junction City
    • Oregon
    Selling the below pieces for an AR-15 pistol for 300blk or 5.56. SBPDW Brace Magpul MOE pistol grip Spike Tactical LW BAR2 9" quad rail (has all original papers and items). All items were finished in Multi-cam black by Joint Force Enterprises. Will include either x3 Magpul Gen3 300blk...
  7. DameTime5

    VLTOR CASV-M-2 300blk Pistol

      1. For Sale
      2. For Trade
    • $900
    • Post Falls
    • Idaho
    Got a sweet 300blk build that I'm wanting to trade for a 300blk Krink. I've got too many ARs and not enough AKs. Interested in 9mm PCCs, Ruger mini 14 300blk (maybe 7.62x39). Build list: Anderson Lower (hell ya, brand new), Aero LPK (brand new), B5 grip, keyhole upper (I think Ruger), BCM...
  8. tabh3366911

    PSA JAKL 300 blackout fde

      1. For Sale
    • $1000
    • lebanon
    • Oregon
    Like new psa jakl in 300 black out, 8.5" barrel probably has 200rds through it or less troy ambi mag release larue 2 stage trigger cheap bushnell red dot ambi 45 degree safety bcm grip x4 lancer mags and x2 pmags all for 300blk I have about 600 or more rounds of ammo id like to get rid of with...
  9. H

    Daniel defense DDM4 300blk

      1. For Sale
    • $1000
    • Hillsboro
    • Oregon
    Up for sale is a 16" 300blk Daniel Defense DDM4 I bought from a member on here. I believe the upper and lower were purchased separately. This was my intro into 300 blk, loved it so much I bought the pistol version and that's why I am selling this. I have shot about 300 rds through it. Comes with...
  10. oregunbob541

    .300 Blackout mags

      1. Want to Buy
    • Springfield
    • Oregon
    Looking to pick up a few .300 Blackout mags. Let me know if you have any for sale. Thanks
  11. DameTime5

    Creality CR-10S with Upgrades & Extras

      1. For Sale
      2. For Trade
    • $150
    • Post Falls
    • Idaho
    Just purchased this and don't have the time or patience to learn how to use it. Don't have the space for it either. Upgraded metal extruder, upgraded extruder gear, Capricorn Bowden tube, and Noctua fan. Comes with random tools and spare parts as well as an all metal hot end that's not...
  12. RallySoob

    300 blackout 7.5 custom AR15

      1. For Sale
    • $1100
    • Springfield
    • Oregon
    $1,100 2 braces included! SBA4 and Magpul BDA PSA 7.5” 300blk upper with 7” handguard PSA stealth lower Timber creek lower parts kit (safety, pins, etc) PSA single stage polish NiB trigger Magpul Rubberized pistol grip Fortis LE gold castle nut with qd sling port Magpul backup iron sight...
  13. KrazyRedhead

    SOLD THE Q HONEY BADGER 300BLK BARREL

      1. For Sale
    • $295
    • Junction City
    • Oregon
    Selling a The Q 300blk Honey Badger barrel and 90% taper adapter. Was used in a build, had less than 50 rounds shot through it, and ended up changing directions on the caliber. Barrel is the 7" 1.5 twist rate with the best gas block lockup design I have ever encountered. There is a place for a...
  14. Barfly

    CFE BLK powder

      1. For Sale
    • $45
    • Olympia
    • Washington
    I have some spare 1lb jugs of CFE BLK available. It's fairly recent and has been stored properly. I'm in Olympia, WA. but I travel down to Roseburg, OR. area fairly often to visit my folks and can meet up along I5. $45/lb
  15. Bolt_308

    Sold- 300BLK AR-15 Pistol with brace- unfired. Free Ramen with purchase!

      1. For Sale
    • $479
    • Salem
    • Oregon
    Taking inventory, I realized that I got a little carried away and i have multiple PSA 300 Blackout AR Pistols in the back of the safe. WHOOPS! Now that I splurged on a 300BLK Sig Spear LT, they are redundant and not needed. Purchased new by me and never fired. It has been sitting in the...
  16. MDDM

    9" Radian Model 1 - 300blk

      1. For Sale
    • $2800
    • Hillsboro
    • Oregon
    Up for grabs is a rare bird, an urban multicam Radian Model 1. This was a limited run direct from Radian. Less than 120 rounds through it. Trade interests include a 16" MPX, SCAR, REPR, SP5, or a 1911 chambered in 10mm. Possibly interested in 6mm ARC or reloading gear/components. Not...
  17. BrandonQuixote

    180gr .308 Rainier Wedge bullets, FMJ & HP

      1. For Trade
    • Hillsboro
    • Oregon
    Never worked up a load with these, pretty sure they’re not made anymore either 104 of the HP’s 82 of the FMJ’s Would like to trade for an equal amount of 110gr Vmax or 125gr Hornady FMJ or 125gr Speer Varmint TNT’s- all in .308 Brandon 9514426918
  18. Valkyrie

    Jtac industries Elf Owl 300blk

      1. For Sale
    • $1900
    • Kenmore
    • Washington
    Up for sale is an unfired Jtac industries Elf Owl. It is a 7in 300blk with a 1:5 twist barrel. It has the collapsing brace with a gearhead works brace. Color is carbon grey cerakote. Comes with 1 mag
  19. DameTime5

    8 Wilson Combat/Aero Precision 300blk

      1. For Sale
      2. For Trade
    • $700
    • Sandy
    • Oregon
    Just built this out, decided I want something different. Everything is Aero Precision minus the barrel (brand new wilson combat barrel) and the lower (Griffin Armament MK1). Can add a Aero Precision Pro BCG and VLTOR/BCM CH for an additional $180. Barrel, rail, gas block, gas tube, and muzzle...
  20. AlHalvy

    Sig Sauer MCX Spear LT 9 300BLK, tasteful mods, Like New (30 rounds fired)

      1. For Sale
    • $2000
    • Happy Valley
    • Oregon
    Sig Sauer MCX Spear LT in 300 Blackout with 9" Barrel. Has had exactly 30 rounds fired through it, could pass as new. Original owner, purchased at NW Firearms. Comes with original box, factory trigger, charging handle and safety. Mods included: Larue MBT-2s Trigger Radian Raptor Charging Handle...
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