300 Blackout ammo was developed by Advanced Armament Corporation and Remington Defense in 2010 and standardized by the Sporting Arms and Ammunition Manufacturers Institute (SAAMI) in 2011, the 300 AAC Blackout (also known as 300 BLK or 7.63x35mm) is a relatively young cartridge, but one that is rapidly gaining in popularity.

The 300 BLK was developed around a long list of design parameters intended to allow the use of .30 caliber projectiles in the AR/M4 platform. Chief among them, the cartridge had to feed reliably from standard 30 round magazines and utilize their full capacity, which previous attempts with the 7.62x39 cartridge (used in the AK-47) failed to do. Other requirements included the ability to operate suppressed or unsuppressed in a short, lightweight configuration.

The propellants used in 300 BLK cartridges tend to be much faster burning than typical rifle powders, meaning the 300 BLK is well suited to pistol-length gas systems and suffers relatively little in the way of velocity when fired from short barrels. This makes the 300 BLK an ideal choice for AR-style pistols or short-barreled rifles.

The cartridge uses a shortened 221 Fireball or .223 Remington case, shortened to 35mm with the new case mouth necked down to .308 caliber. Bullet weights for the 300 BLK range from 110 grain to 250grain, with lighter projectiles suited to maximum velocity while the heavier bullets are used for subsonic work and maintain high energy despite limited velocity.

Ballistically, the 300 BLK performs much like the 7.62x39mm cartridge, with a shorter effective range than 5.56x45mm NATO, but with more kinetic energy than the latter. Because of these characteristics, the 300 BLK is well suited to close range combat and for hunters wishing to use the AR platform.

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18 Item(s)

  1. 500rds – 300 AAC Blackout Magtech First Defense 123gr. FMJ Ammo

    71 In Stock

  2. 50rds - 300 AAC Blackout Magtech First Defense 123gr. FMJ Ammo

    28 In Stock

  3. 500rds - 300 AAC Blackout Federal American Eagle 150gr. FMJ Ammo

    10 In Stock

  4. 50rds - 300 AAC BLACKOUT Fiocchi 150gr. FMJBT Ammo

    ☆☆☆☆☆ 4 Review(s)


    38 In Stock

  5. 20rds - 300 AAC Blackout Federal American Eagle 150 Grain FMJ Ammo

    14 In Stock

  6. 20rds – 300 AAC BLACKOUT Sellier & Bellot 147gr. FMJ Ammo

    112 In Stock

  7. 200rds - 300 AAC Blackout Remington UMC 120gr. OTFB Ammo

    ☆☆☆☆☆ 2 Review(s)


    27 In Stock

  8. 25rds – 300 AAC BLACKOUT Fiocchi Extrema 125gr. Hornady SST Ammo

    117 In Stock

  9. 20rds - 300 AAC BLACKOUT Remington 220gr. OTFB Ammo

    124 In Stock

  10. 20rds – 300 AAC Blackout Federal American Eagle Suppressor Subsonic 220gr. OTM Ammo

    1 In Stock

  11. 20rds - 300 AAC Blackout Remington UMC 120gr. OTM Ammo

    71 In Stock

  12. 20rds – 300 AAC BLACKOUT Hornady 135gr. FTX Ammo

    20 In Stock

  13. 20rds - 300 AAC BLACKOUT Nosler Varmageddon 110gr. FB Tipped Ammo

    9 In Stock

  14. 20rds - 300 Whisper Corbon 125gr. JHP Ammo

    108 In Stock

  15. 20rds - 300 Whisper Corbon Hunter 150gr. JSP Ammo

    75 In Stock

  16. 20rds - .300 AAC BLACKOUT Remington 220gr. OTM Subsonic Ammo

    34 In Stock

  17. 20rds - .300 AAC BLACKOUT Remington Premier Match 125gr. OTM Ammo

    ☆☆☆☆☆ 1 Review(s)


    12 In Stock

  18. 20rds - 300 AAC BLACKOUT Nosler Match Grade 125gr. Ballistic Tip Ammo

    ☆☆☆☆☆ 1 Review(s)


    5 In Stock

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18 Item(s)