The .300 Blackout rifle cartridge is also known as 300 AAC Blackout, 300 BLK, and 7.62x35mm. Its design comes from the idea to develop a cartridge more powerful than AR-15’s native 223/5.56, with ballistics similar to those of the 7.62x39mm. This new cartridge had to work reliably with both supersonic and subsonic ammo, in the barrel that is less than 16 inches long. When fired through a suppressor, .300 Blackout bullets give a silent, yet powerful rifle. This ammo can be used for hunting, target shooting, as well as for home defense. Learn more about 300 BLK

Product Per round Price Status/Qty Last change Last update Store
200 Round Case - 300 Blackout 168 Grain Boat Tail Hollow Point Ammo By Ammo Incorporated - 300B168BTHP-A20 $0.90/rd $179.50 4 167d ago 58m ago SGAmmo
200 Round Case - 300 Blackout 190 Grain Sub-X Hornady Subsonic Ammo - 80877 $1.70/rd $339.50 10 162d ago 58m ago SGAmmo
200 Round Case - 300 Blackout 200 Grain Open Tip Subsonic Winchester Super Suppressed Ammo - SUP300BLK $1.10/rd $219.50 7 52d ago 58m ago SGAmmo
200 Round Case - 300 Blackout 200 Grain Open Tip Subsonic Winchester USA Ammo - USA300BLKX $1.10/rd $219.50 14 162d ago 58m ago SGAmmo
200 Round Case - 300 Blackout Federal Fusion 150 Grain Bonded Soft Point Ammo - F300BMSR2 $1.35/rd $269.50 12 37d ago 58m ago SGAmmo
200 Round Case - 300 Blackout Subsonic 208 Grain Amax Hornady Black Ammunition - 80891 $1.60/rd $319.50 8 162d ago 58m ago SGAmmo
200 Round Metal Crate Canister - 300 Blackout 150 Grain Winchester Deer Season XP Extreme Point Ammo - X300BLKDS $0.90/rd $179.50 8 15d ago 58m ago SGAmmo
240 Round Can - 300 AAC Blackout 124 Grain FMJ Ammo By Sellier Bellot - SB300BLKA - Packed in Mini Ammo Canister $0.92/rd $219.50 4 22d ago 58m ago SGAmmo
250 Rounds of American Quality .300 Blackout Ammunition Bulk Pack FMJ 147 Grains N300147VP250 250 rounds 04806015501886 $0.60/rd $149.89 In Stock 58d ago 50m ago Cheaper Than Dirt
30 Round Box - 300 Blackout 108 Grain HV LF STYX SX Ruag Ammo Made in Switzerland $1.50/rd $44.95 121 153d ago 58m ago SGAmmo
300 AAC - 200 gr OT - Winchester Blackout (SUP300BLK) - 200 Rounds $1.04/rd $209.00 In Stock 83d ago 16m ago Bulk Munitions
300 AAC Blackout - 110 Grain eXergy Blue - Sellier & Bellot - 20 Rounds 8590690341849 $1.50/rd $30.00 125 180d ago 45m ago Lucky Gunner
300 AAC Blackout - 110 Grain V-MAX - Ammo Inc. - 20 Rounds 818778022656 $0.95/rd $19.00 56 79d ago 45m ago Lucky Gunner
300 AAC Blackout - 110 Grain V-MAX - Ammo Inc. - 200 Rounds $0.92/rd $185.00 108 51d ago 45m ago Lucky Gunner
300 AAC Blackout - 110 Grain V-MAX - Hornady BLACK - 20 Rounds 090255808735 $1.50/rd $30.00 68 30d ago 45m ago Lucky Gunner
300 AAC Blackout - 110 Grain V-MAX - Hornady BLACK - 200 Rounds 090255808735 $1.42/rd $285.00 24 59d ago 45m ago Lucky Gunner
300 AAC Blackout - 115 Grain HP - Sierra Outdoor Master - 20 Rounds 092763600214 $1.12/rd $22.50 7 5d ago 45m ago Lucky Gunner
300 AAC Blackout - 120 Grain HP - Federal - 20 Rounds 50004544627759 $1.65/rd $33.00 10 50d ago 45m ago Lucky Gunner
300 AAC Blackout - 120 Grain JHP FB - Barnes - 20 Rounds 716876120307 $1.20/rd $24.00 46 180d ago 45m ago Lucky Gunner
300 AAC Blackout - 120 Grain TAC-TX BT - Barnes VOR-TX - 20 Rounds 716876301201 $2.00/rd $40.00 78 3d ago 45m ago Lucky Gunner
300 AAC Blackout - 120 Grain TAC-TX BT - Barnes VOR-TX - 200 Rounds $1.92/rd $385.00 2 3d ago 45m ago Lucky Gunner
300 AAC Blackout - 124 Grain FMJ - Sellier & Bellot - 20 Rounds 754908512447 $1.00/rd $20.00 142 57d ago 45m ago Lucky Gunner
300 AAC Blackout - 125 Grain FMJ - Hornady Frontier - 20 Rounds 090255713978 $1.20/rd $24.00 123 180d ago 45m ago Lucky Gunner
300 AAC Blackout - 125 Grain FMJ - Hornady Frontier - 200 Rounds 10090255713975 $1.02/rd $205.00 55 80d ago 45m ago Lucky Gunner
300 AAC Blackout - 125 Grain GameChanger - Sierra - 20 Rounds 612710135424 $1.55/rd $31.00 30 3d ago 45m ago Lucky Gunner
300 AAC Blackout - 125 Grain Open Tip - Winchester USA - 20 Rounds 020892224568 $1.00/rd $20.00 112 148d ago 45m ago Lucky Gunner
300 AAC Blackout - 125 Grain Open Tip - Winchester USA - 200 Rounds $0.85/rd $170.00 159 146d ago 45m ago Lucky Gunner
300 AAC Blackout - 125 Grain OT - Winchester USA Ready - 20 Rounds 020892226562 $1.20/rd $24.00 142 180d ago 45m ago Lucky Gunner
300 AAC Blackout - 125 Grain OTM - Black Hills - 20 Rounds 612710127580 $1.60/rd $32.00 125 169d ago 45m ago Lucky Gunner
300 AAC Blackout - 125 Grain Sierra TMK - Black Hills - 20 Rounds 612710131976 $1.65/rd $33.00 130 3h ago 45m ago Lucky Gunner
300 AAC Blackout - 125 Grain SST - Fiocchi Extrema - 500 Rounds 762344863610 $1.00/rd $500.00 37 27d ago 45m ago Lucky Gunner
300 AAC Blackout - 135 Grain FTX - Hornady - 20 Rounds 090255808810 $1.60/rd $32.00 119 161d ago 45m ago Lucky Gunner
300 AAC Blackout - 147 Grain FMJ - Doubletap Match - 20 Rounds 91037349101 $0.95/rd $19.00 66 180d ago 45m ago Lucky Gunner
300 AAC Blackout - 147 Grain FMJ - Winchester USA - 20 Rounds 020892231030 $1.10/rd $22.00 122 80d ago 45m ago Lucky Gunner
300 AAC Blackout - 147 Grain FMJ - Winchester USA - 200 Rounds $0.90/rd $180.00 9 80d ago 45m ago Lucky Gunner
300 AAC Blackout - 150 gr FMJ - Federal American Eagle (AE300BLK1) - 500 Rounds $0.83/rd $414.00 In Stock 120d ago 16m ago Bulk Munitions
300 AAC Blackout - 150 Grain CTFB - Remington UMC - 20 Rounds 047700410302 $1.25/rd $25.00 26 180d ago 45m ago Lucky Gunner
300 AAC Blackout - 150 Grain CTFB - Remington UMC - 200 Rounds 047700410319 $1.22/rd $245.00 8 180d ago 45m ago Lucky Gunner
300 AAC Blackout - 150 Grain FMJ - Ammo Inc. - 20 Rounds 818778021826 $0.90/rd $18.00 100 180d ago 45m ago Lucky Gunner
300 AAC Blackout - 150 Grain FMJ - Ammo Inc. - 500 Rounds 0213202316167 $0.65/rd $325.00 51 7d ago 45m ago Lucky Gunner
300 AAC Blackout - 150 Grain FMJ - Corbon Performance Match - 20 Rounds 851383008073 $0.88/rd $17.50 43 180d ago 45m ago Lucky Gunner
300 AAC Blackout - 150 Grain FMJ - Federal American Eagle - 20 Rounds 604544617009 $1.20/rd $24.00 134 180d ago 45m ago Lucky Gunner
300 AAC Blackout - 150 Grain FMJ - Federal American Eagle - 500 Rounds 50004544617002 $0.94/rd $470.00 62 20d ago 45m ago Lucky Gunner
300 AAC Blackout - 150 Grain FMJ - Fiocchi - 50 Rounds 762344711010 $0.90/rd $45.00 154 161d ago 45m ago Lucky Gunner
300 AAC Blackout - 150 Grain FMJ - Fiocchi - 500 Rounds 762344863580 $0.68/rd $340.00 52 13d ago 45m ago Lucky Gunner
300 AAC Blackout - 150 Grain JSP - Federal Power-Shok - 20 Rounds 604544650488 $1.30/rd $26.00 129 180d ago 45m ago Lucky Gunner
300 AAC Blackout - 190 Grain Sub-X - Hornady Subsonic - 20 Rounds 090255808773 $1.60/rd $32.00 117 141d ago 45m ago Lucky Gunner
300 AAC Blackout - 190 Grain Sub-X - Hornady Subsonic - 200 Rounds 10090255808770 $1.50/rd $300.00 60 63d ago 45m ago Lucky Gunner
300 AAC Blackout - 200 Grain Open Tip - Winchester Subsonic - 20 Rounds 020892224582 $1.10/rd $22.00 131 22d ago 45m ago Lucky Gunner
300 AAC Blackout - 200 Grain Open Tip - Winchester Subsonic - 200 Rounds $0.88/rd $175.00 140 8h ago 45m ago Lucky Gunner

300 Blackout Ammo

The .300 AAC Blackout is an intermediate cartridge designed to share ballistics similar to those of the 7.62x39 (AK-47 cartridge). It was developed for use in the M4 carbine and can be fired from a standard 5.56mm AR by only changing out the barrel.

It is also known as:

  • 300 BLK
  • 300 AAC Blackout
  • 7.62x35mm

Advanced Armament Corporation collaborated with Remington Defense to develop a .30 caliber cartridge that would surpass the performance of 5.56mm ammo. This long-contemplated idea of replacing AR-15s native 5.56mm came to life after United States Government launched an international military campaign aka global war on terror after 9/11, and our troops found themselves in unfamiliar geography and unknown situations. The demand for a cartridge that has was more powerful and more silent lead to AAC developing 300 Blackout ammo for special operations forces, using a 5.56mm case cut down to fit a 30- caliber bullet.

When was 300 BLK invented?

Although AR-pattern rifles and carbines had been previously chambered in different 30 calibers, feeding issues were present with each attempt. Many ammunition manufacturers had tried and failed, including Colt Firearms. The solution was found thanks to wildcatters. One of the wildcatted cartridges - .300 Whisper served as a concept to get to the final result, and the one to be submitted to SAAMI. Development began in 2009, with the cartridge approved by SAAMI in 2011.  

What’s the difference between 300 AAC and 5.56 / .223? 

Even though both rifle cartridges are suitable for target shooting, hunting, and home defense, there are a few differences between them.
300 blk bullet is stubbier, thicker, and heavier. 5.56mm NATO requires a longer barrel length, at least 12”. Once you add additional few inches that suppressor takes, it becomes impossible to get a powerful, yet short rifle.
On the other hand, 300 BLK works best in shorter-than-average barrels, which makes it super suitable for suppressed use. 300 blackout works reliably with both supersonic and subsonic ammo, but it shines when using subsonic and a suppressor, giving you a quiet and powerful bullet.
5.56 has a faster velocity and shoots flatter, while 300 penetrates through more material.  

300 BLK overcomes some of the shortcomings of larger calibers while providing the AR 15 with the possibility to shoot a larger round, with only switching the upper receiver.  

.300 AAC Blackout round military use

Netherlands 

The first formal adoption of 300 AAC happened in July 2015, when the Netherlands’ defense material organization bought 195 carbines chambered in this round. These integrally suppressed 300 BLK carbines were purchased for the Dutch Maritime Special Operations Force and modified to for use with ballistic visor helmets. 

United Kingdom 

Ministry of Defense ordered the supply of 300 Blackout ammo on a five-year contract, including the option to extend for an additional five years. The government noted the previous use of this round. 

United States

This round has not yet seen wide use in American Special forces, although SOCOM started using it in 2017, considering offers on how to modify 5.56 to accommodate 300 AAC rounds.   

Popular 300 Blackout Ammo Brands 

  • Remington
  • Fiocchi
  • Hornady
  • Magtech
  • Aguila
  • Sellier & Bellot
  • Barnes 

Which guns use 300 BLK Ammo?

A few popular models, including top-shelf rifles using with both supersonic and subsonic ammo, rifles widely used for home defense, hunting, or target shooting:
  • Daniel Defense DDM4
  • Wilson combat protector
  • IWI-US Tavor X95
  • Springfield Armory Saint
  • SIG MCX VIRTUS PISTOL
  • Ruger Ruger American Ranch Rifle
  • Ruger AR-556
Our selection is in no particular order regarding the best 300 blackout gun. Use this list as your starting point when searching for a weapon that suits you best.
Scroll to top