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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. JV87

    PSA Jakl 8.5" 300BO

      1. For Sale
    • $1000
    • 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 meet in Beaverton, buyer pays FFL
  2. 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.
  3. 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...
  4. 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
  5. 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...
  6. ScottInPDX

    WTB: Small quantities of subsonic 300 BO

      1. Want to Buy
    • Tualatin
    • Oregon
    I'm switching a rifle over to 300BO, and I want to try a couple of different factory loads to see which ones work best for it. I'm looking to buy 20-60 rounds of subsonic, no remans, steel case is fine. I'll pay cash and pick up in person from Wilsonville to Portland near I5. I'll consider...
  7. Userone

    Lee Loadmaster and accessories

      1. For Sale
      2. For Trade
    • $100
    • Bremerton
    • Washington
    For sale is my used lee load master. I purchased it 3 years ago and put 30-35k rounds through it. The reason I'm selling it is to upgrade to a 10 stage press. The press is functional however it has some qurkes so I would recommend it for parts or as a secondary press. It has ufo lights...
  8. aasbra

    Lee 300 BLK die set

      1. For Sale
    • $30
    • Tigard
    • Oregon
    Lee 300 BLK 3 die set, plus shell case trim kit. Appears to be unused. $30, meet FTF around Tigard/Tualatin area or will ship if buyer covers cost.
  9. ScottInPDX

    WTB: 20 and 30 round 300BO AR Mags

      1. Want to Buy
    • Tualatin
    • Oregon
    Looking to build a stash of 300BO AR mags. Mainly interested in Magpul, Lancer, and D&H. Will consider others, but not interested in ProMag, HexMag, or Hera.
  10. M

    300 blackout upper

      1. For Sale
      2. For Trade
    • $350
    • Kelso
    • Washington
    300 blackout upper, adjustable gas block, 10-in barrel, 40 or 50 rounds through it. Runs fine with my osprey on it. Comes with all the ammo in that can. 120 to 140 rounds.
  11. WIN308

    Best deal on upper in 556.

      1. For Sale
      2. For Trade
    • $280
    • Hillsboro
    • Oregon
    I have one upper for sale. It's pretty sweet but I want to fund a different project! It's a spikes tactical upper receiver, All black, chambered in 556, has quad-rail handguard, 11.5" barrel. I added the strike industries King comp to go with the "Oppressor" blast shield. $280 OBO Trades...
  12. WIN308

    Best deal on AR Uppers 556,300BLK

      1. For Sale
      2. For Trade
    • $220
    • Hillsboro
    • Oregon
    MOVED TO CLASSIFIED, AR PARTS.. I have two uppers for sale. They're pretty sweet but I want to fund a different project! Also, check my other post for the springfield VHS-2 (Hellion) bullpup rifle. First upper: It's a spikes tactical upper receiver, All black, chambered in 556, has quad-rail...
  13. A

    Knight's Armament SR-30 9.5" Complete Upper Receiver - BNIB **Price Reduced**

      1. For Sale
    • $2695
    • Tigard
    • Oregon
    Selling a brand new-in-box KAC SR-30 9.5" Complete Upper Receiver w/new E3.2 bolt and ambi charging handle. Recently discontinued and had an unexpected backorder filled. Asking $2,695 - not looking for trades at this time.
  14. L

    SOLD - AMMO INC 300 Blackout, 200 rds for $100

      1. For Sale
    • $100
    • Canby
    • Oregon
    For Sale: Ammo Inc 300 Blackout, 200 rounds with can, 110gr V-Max $140 FTF in Canby Oregon
  15. RainMan_PNW

    MCX Virtus 9" 300BLK Barrel and Handguard

      1. For Sale
    • $450
    • La Center
    • Washington
    MCX Virtus 9" 300BLK Barrel w/ Midwest Industries taper barrel adapter $450 MCX Virtus PDW-length slim handguard (correct length for the barrel) $40 Price is FTF or shipped PM me if you are interested
  16. E

    Anderson Arms AM-15 300blk w/ 6 mags

      1. For Sale
    • $850
    • Forest Grove
    • Oregon
    I have an Anderson Arms AM-15 (AR 15 clone) with some PMAG attachments. It will come with six (6) 300blk PMAGs. I have the original mag baseplates, too. Gun has about 300 rounds through it.
  17. E

    Anderson Arms AM-15 300blk w/6 mags

      1. For Sale
    • $850
    • Forest Grove
    • Oregon
    I have an Anderson Arms AM-15 (AR 15 clone) with some PMAG attachments. It will come with six (6) 300blk PMAGs. I have the original mag baseplates, too. Gun has about 300 rounds through it.
  18. T

    BRN-180 Lower

      1. For Sale
    • $150
    • Tigard
    • Oregon
    Brownells BRN-180 Lower About 250-300 rounds through it. Great shape. Ergo grip. No shipping. $150
  19. P

    10.5” PSA Upper with Warcomp 300 blackout

      1. For Sale
    • $350
    • Everett
    • Washington
    200-300 subs ran through it all suppressed. Can’t afford 300 blackout anymore. I also have (2) boxes of 220gr sig sauer subs and (1) box of Hornady black 208gr subs. Looking for $350 for the upper, I’ll cover shipping if you want it shipped. Ammo would be $50 for all three boxes.
  20. Awmish

    Savage Axis 300 Blackout in True Timber Strata Camo Stock W/ Accesories

      1. For Sale
    • $300
    • Beavercreek
    • Oregon
    I purchased this for this last hunting season as I couldn't find the rifle I wanted, but seeing as I just found that rifle this rifle must go. It is a Savage Arms Axis chambered in 300 Blackout with the Factory Weaver 3-9x40, but I added a Glades Armory throw lever with oversized bolt knob and a...
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