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.300blk

The 300 AAC Blackout (designated as the 300 BLK by 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 M4 while using standard M4 magazines at their normal capacities. Ammunition in 300 BLK cannot be used in a rifle chambered for 7.62×40mm Wilson Tactical. It is mainly derived from the 300 Whisper concept, but differs in having been submitted to SAAMI.

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Recent contents
  1. 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...
  2. liamstriding

    SIG MCX 9” .300BLK Complete Upper - AR Conversion Parts included

      1. For Sale
    • $1850
    • Sandy
    • Oregon
    $1850 shipped. New in box, complete MCX 9” .300 BLK upper assembly in black. Comes with taper cap, SIG match duo trigger for AR lower, buffer tube adapter for MCX upper to run on AR lower, receiver extension. No trades, just looking to sell. Cheers.
  3. rjones715

    EOTECH HWS 300 Blackout

      1. For Sale
    • $490
    • Springfield
    • Oregon
    This is pretty much brand new in the box. It has only been turned on. $490 and it's yours! You can see it on Amazon here. Overview: Engineered for subsonic stealth in extreme tactical environments, the XPS2-300™ HWS® offers a two-dot ballistic drop reticle. This allows an operator to zero both...
  4. ConcernedCitizen

    Primary Arms 4X Prism Scope, 7.62x39/.300BLK ACSS Illuminated Sub/Super Reticle, w/ Killflash

      1. For Sale
    • $200
    • Tigard
    • Oregon
    Primary Arms 4X Prism Scope, 7.62x39/.300BLK ACSS Illuminated Sub/Super Reticle, w/ Killflash $200 FTF near Tigard/Tualatin or Beaverton/Hillsboro.
  5. SHOOTZMEDLER

    AR PISTOL COMPLETE

      1. For Sale
      2. For Trade
    • $800
    • Springfield
    • Oregon
    Hey there y'all. This has been sitting in my safe barely ever used and I think it would be better in someone else's hands. Built it with intentions of being my only pistol AR but soon after built multiple others and all are .556 so decided to let it go.
  6. Red98422

    10.5” 300 blackout AR pistol

      1. For Trade
    • Tacoma
    • Washington
    *****TRADE PENDING***** It’s got exactly 100 rounds through it and the pictured red dot is included. Build list: Aero precision lower Shockwave brace (and buffer tube) Polished mil spec trigger (no grit but still heavy) Magpul pistol grip Upper is a bear creek Arsenal. Free float M-lock hand...

  7. Discussion: .300 Blackout 220gr Hornady Interlock

    I'll be working through this week making some 220gr Hornady Interlocks to feed the Ruger Ranch that I "stole" from a local member. I told him when he decides to sell, look my way, and he did. 5.56 in front, .300 in back. I went out today and did some preliminary sighting in with 150gr...
  8. Jarhead0093

    WTS OR  BCM .300BLK Pistol/SBR Upper

    For sale is my BCM Upper in .300 Blackout. The upper has a 9” barrel with an AAC Brakeout muzzle device. Less than a mag through it. No BCG or CH. Included will be 5 .300 BLK Pmags. 2 loaded with Supersonic ammo and 2 loaded with Subsonic ammo. Looking for $425 obo. Trade for an Aimpoint H-1...
  9. BarbusBadarse

    WTB OR  AAC .300blk handi rifle

    If you have one send me a message I am looking !!
  10. etrain16

    .300 BLK - Does Barrel Profile Matter for Suppressed Use?

    With a suppressor on the way, I'm very interested in adding a .300 BLK upper to shoot subsonic rounds with that suppressor. I've been doing some reading/research and I'm seeing that approximately 10" barrel length is the optimum for .300 BLK, though it can work fine down to about 8". But my real...
  11. MasterChief

    Magazines - Amend2

    $8.99/ea if you order 6+ No coupon necessary. Plus free shipping and no tax. Amend2 Glock & AR15/M4 Magazines
  12. NoLimePlease

    WTT OR  AR in .300 BO Pistol Braced WTT for Scope

    Sold
  13. M

    WTT OR  .300blk upper

    .300 blk upper complete minus charging handle and bcg, free float keymod rail 16in barrel with 1-8 twist and pistol length gas system so you can run subs reliably without a can, the receiver has a Mueller forge mark that's all I can tell you about it, it has approximately 200rds down the tube...
  14. MasterChief

    2017 Black Friday Sales/Deals

    Where is everyone looking online for Black Friday deals? (I'm not going to be able to pick up in person so only looking for online specials) I really like free shipping :) If you find something gun related please feel free to post anything you find. Where i'm going to be looking is: AmmoSeek...
  15. enochRoot

    WTS OR  360 rounds .300BLK

    SOLD
  16. ruger7x57

    WTS/WTT OR  300blk

    So I have a 300blk setup I'd like to trade or sell. -Ballistic advantage 9.5" barrel. 1/8 twist. Less than 100 rounds fired through it. It comes with a steel Krinkov muzzle device, low profile gas block and tube. -SMOS 13.5" rail that I had cut down to 11" so barrel would tuck inside. Includes...
  17. Bravocharlieniner

    WTS OR  .300 black side charging AR

    For sale is a x-products .300 black out complete upper. Barrel is 12.5" and with the A2 the total length is 14.5" from the upper receiver. Asking $500 obo, need to sell by Sunday.
  18. S

    WTS OR  8.5" .300blk pistol/SBR upper - Spikes, Ballistic Advantage, Fortis Rev, Raptor CH, NiTeflon BCG

    Hi - Ive got an almost complete .300blk upper with 10 boxes of Gorilla subsonic ammo (the good stuff). Just missing a muzzle device Parts: -8.5" Ballistic Advantage Barrel -7" Fortis Rev keymod rail -Spikes slickside upper -Raptor CH and Nickel Teflon BCG (purchased from Curts) -Diamondhead...
  19. Bornlifted

    WTS/WTT OR  Winchester primers

    Wanting to sell or trade 5k Winchester large pistol primers 4800 Winchester large rifle primers ***UPDATED August 3rd*** $140 per case or $30 per k cash Offers accepted Still cheaper than paying hazmat fees Or trade for small rifle/small pistol primers 1for1 Dillon 300 blkout trim die...
  20. Bravocharlieniner

    WTS OR  Xproducts .300blk side charging complete upper

    .300 black out Xproducts side charging complete upper with A2 birdcage. The barrel length is 12.5" and w/ the A2 birdcage is 14.5" from the upper receiver. This is a non-reciprocating upper (i.e. It won't hit your face!) with a Xproducts viper handguard. This is truly a unique setup and I am...
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