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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. Hines11b3x

    JTAC Elf Owl 9 300blk Sig T6 3-18

      1. For Sale
      2. For Trade
    • $3000
    • Stayton
    • Oregon
    For sale or trade JTAC industries Elf Owl 9" 300 blackout Tailhook pistol brace Mlok Keymo flash hider 1 10rd mad 1 5 rd mag Sig tango 6 3-18x44 contract overrun FDE IR compatible. Mil/mil tmr illuminated reticle ADM QD mount $3,000 shipped $1,500 for just gun I have about 400 rds of...
  2. dasher635

    FN FNP-9 9mm

      1. For Trade
    • $400
    • Kent
    • Washington
    I have a FNP-9 in excellent condition up for trade. Pistol is in excellent condition with approximately 250 rounds thru it. Includes owners manual, shell case from factory and lock. More pics available upon request. Trade value $400. Looking for a semi auto in 9mm / 45ACP or bolt action rifle in...
  3. dasher635

    CZ-75B 9mm

      1. For Sale
      2. For Trade
    • $550
    • Kent
    • Washington
    I have a CZ75B in excellent condition up for sale. Pistol has approximately 250 rounds thru it. Pistol was sent to Cajun Gun Works for barrel bushing upgrade to eliminate barrel to slide play. Also received CGW Ultra lite Kit to replace firing pin and other components. Sights replaced with...
  4. F35073

    223 mixed brass for 300 blackout brass

      1. Want to Trade For
    • BURLINGTON
    • Washington
    Looking to trade extra 223 and some 556 mixed in brass, has been tumbled in walnut ot corn cob media, used both over time. Most once fired from range trips. Looking to trade for 300 blackout headstamp brass, can do by count or weight, I usualy use weight and estimate count to save effort...
  5. C

    200 rounds of 300 blackout

      1. For Sale
    • $135
    • ALBANY
    • Oregon
    No longer own a 300 so here's some ammo. 220 grain 300 blackout by ammo incorporated. 200 rounds total. May consider trades for 9mm or .22 ammo.
  6. ScottInPDX

    300 BO Subs, 40x Sig and 40x Hornady black

      1. For Sale
      2. For Trade
    • $75
    • Tualatin
    • Oregon
    80 subsonic 300 BO rounds 40x Sig 220 grain Elite Performance Match, OTM 40x Hornady Black 208 grain AMAX I took these in trade a while ago but don't really have a need for match ammo in 300BO, the bulk stuff is fine. Will trade for S&B 300BO, x160 supers or x120 subs.
  7. outontherange

    300 Blackout high end parts on Aero Lower

      1. For Sale
    • $750
    • Portland
    • Oregon
    Shoot smoothly and reliably. CMMG Stainless barrel with Carbine length gas system. Flip up Magpul front site. Titanium flash hider. Seekins billet upper. Colt bcg. F1 Firearms free floating handguard. Comes with 60 rounds of factory ammo.
  8. K

    AR Pistol (5.56 and .300) Lot!

      1. For Sale
      2. For Trade
    • $1550
    • Portland
    • Oregon
    Hey folks. I started to get into building an AR pistol and ultimately found I didn't like the platform enough to stick with it. Low / No rounds through it, but lots of fun potential! PSA P1-15 10.5" Multi complete (5.56 upper, PSA Pistol/Multi lower) +MAGPUL Handguard +Primary Arms Adjustable...
  9. Bolt_308

    Sold -Price drop- 2 PSA 300BLK AR Pistols- (unfired) clearing out the back of the safe. Free Ramen with purchase!

      1. For Sale
    • $369
    • Salem
    • Oregon
    Taking inventory, I realized that I got a little carried away and i have 2 PSA 300 Blackout AR Pistols set ups in the back of the safe. WHOOPS! Now that I splurged on a 300BLK Sig Spear LT, they are redundant and not needed. Both were purchased new by me and never fired. They have been sitting...
  10. dude23

    RIFLE & PISTOL Powders, Primers, Bullets .223 / 9mm & RCBS Rockchucker Supreme Reloader

      1. For Sale
    • Portland
    • Oregon
    RELOADING SUPPLIES FOR SALE Prices were adjusted from various online sources. Make a reasonable offer. Most of the components were bought from 2016-2020 and stored in a temperature controlled environment. Primers were stored in a sealed ammo can with desiccant packs. Powder: Winchester...
  11. Gun Stuff

    Savage Axis .300 Blackout 16 Threaded Camo Stock with Scope

      1. For Sale
      2. For Trade
    • $325
    • Springfield
    • Oregon
    Savage Axis .300 Blackout with a 16” barrel threaded at 5/8x24 for a suppressor. Bushnell Banner 3-9x40 scope. I bought this rifle new. It has about 40 rounds through it. Like new condition. Only trades would be for 6mm ARC or 6.5 Grendel uppers or full AR-15 style rifles in these calibers.
  12. D

    TACTICAL KINETICS 12.5 INCH AR-15 300 BLACKOUT MELONITE BARREL

      1. For Sale
    • $100
    • Canby
    • Oregon
    Barrel is like new. Around 50rds down the pipe and I decided to go with a different set up all together. The 50rds that I shot out of it functioned as it should have. Here is the link to the site that I bought it...
  13. notgarandthumb

    SIG Rattler 5.5 Kit 300BLK

      1. For Sale
    • $1200
    • Newberg
    • Oregon
    I have a brand new Sig Rattler 5.5" conversion kit in 300BLK. I've never shot it and hate seeing it sit. It includes the complete upper and the stock pic rail knuckle. I also have a sig pro trigger and a triggertech MCX trigger I want to sell, and the stock, deltapoint pro and holosun laser are...
  14. Markhofstetter

    Polymer80 lowers lot

      1. For Sale
    • $800
    • Milwaukie
    • Oregon
    Looking to preferably sell all together but will to piece out as well if needed. Brand new in box complete with jigs: (2) PF940v2 Standard frame in Black compatible with the Gen 3 of Glock 17, 17L, 34; 40 Smith &Wesson G22, 35, 24; .357 Sig G31. (2) PF940C Compact frame in Gray compatible with...
  15. DraguNovice

    300BLK 7.5" pistol with SB4 brace, 190 rounds, 4 300blk specific Pmags and Sig Romeo MSR red dot

      1. For Sale
    • $650
    • BEAVERTON
    • Oregon
    Selling my 300blk pistol with extras. - Milspec buffer tube, BCG, and charging handle. - PSA M-lok railed upper with built-in QD attachment point and fan port compensator. - Magpul MOE grip and trigger guard. - SB4 brace - PSA milspec 7075-T6 lower with standard FCG. - 190 rounds of ammo: 170...
  16. JV87

    PSA Jakl 8.5" 300BO

      1. For Sale
    • $800
    • Beaverton
    • Oregon
    Selling my PSA 300BO Jakl in 8.5" Has 2 mags through it (60 rds). Built a different setup and don't need to keep this. Comes with the following attached: - Deadair break - Phase5 bolt release - Extended mag release - Magpul trigger guard - Ergo grip. $1000 $900 $800 meet in Beaverton, buyer...
  17. FATAL125

    WTS: WOLF 300blk

      1. For Sale
    • $120
    • Moses Lake
    • Washington
    Selling off a small batch. 300blk - 240 rounds - $120.00 - Wolf steel case FMJ 145gr. Cash, Venmo, PayPal (friends and family only). Shipping available at buyers expense.
  18. officially5150

    Price drop 10.5" 300 blackout pistol with eotech and upgrades

      1. For Sale
      2. For Trade
    • $1000
    • SALEM
    • Oregon
    Selling an ar15 pistol chambered in 300 blackout Specs are Odin works 10.5 with matching 0.750 adjustable gas block (60rnds fired) Aero precision lower Fail zero bolt carrier group Sig sauer mcx grip Ratchet lock buffer tube nut and end plate with qd mount (eliminates the need to stake) Eotech...
  19. FATAL125

    300 Blackout - steel cased - 240 rounds

      1. For Sale
    • $150
    • Moses Lake
    • Washington
    Factory new 240 rounds steel cased Wolf Asking $150.00 for all local. $170.00 shipped via UPS Cash, PayPal (friends & family), Venmo, or Zelle
  20. mx5jacob

    Ultra Compact 300blk AR Pistol

      1. For Sale
    • $1000
    • Florence
    • Oregon
    Well I've been debating selling this for a couple years now and I've finally decided to see if I could find a home for it. I just don't use it much. I've put maybe a couple thousand rounds through it at most. Almost all were subsonic. It has been completely reliable with both subs and supers...
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