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
300 AAC Blackout 145gr FMJ Wolf Polyformance Ammo Case (500 rds) $0.85/rd $423.99 In Stock 8d ago 11m ago The Armory
Wolf Polyformance 300 Blackout Ammo 145 Grain FMJ Steel Case 20 rounds per box $0.85/rd $16.98 In Stock 24h ago 28m ago Orange Target Ammunition
Wolf Polyformance 300 Blackout Ammo 145 Grain FMJ Steel Case 500 Round Case $0.85/rd $424.99 In Stock 10d ago 21m ago Shark Coast Tactical
Wolf Polyformance Ammo 300 AAC Blackout 145gr FMJ - 20RDS - NO LIMIT FAST SHIPPING! - VETERAN OWNED BUSINESS $0.86/rd $17.09 In Stock 2d ago 48m ago Madison Guns
Wolf Polyformance Steel Ammo 300 AAC Blackout 145gr FMJ - 500 ROUNDS (25-20ct Boxes) $0.90/rd $447.77 In Stock 3d ago 10m ago BattleHawk Armory
300 AAC Blackout 145gr FMJ Wolf Polyformance Ammo Box (20 rds) $0.90/rd $17.99 In Stock 10d ago 11m ago The Armory
300 AAC Blackout - 145 Grain FMJ - Wolf (Steel Case) - 500 Rounds 645611308680 $0.93/rd $465.00 56 3d ago 45m ago Lucky Gunner
Wolf Polyformance 300 Blackout Ammo 145 Grain FMJ Steel Case Box of 20 - steel case $0.95/rd $18.99 In Stock 22h ago 37m ago Target Sports USA
Wolf Polyformance Steel Ammo 300 AAC Blackout 145gr FMJ - 20RDS $0.95/rd $18.99 In Stock 16d ago 10m ago BattleHawk Armory
Wolf Polyformance 300 Blackout Ammo 145 Grain FMJ Steel Case Case of 500 (25 Boxes of 20) - Free Shipping - steel case $0.95/rd $474.75 In Stock 22h ago 37m ago Target Sports USA
Wolf 300 Blackout Ammunition WOLF300BLK145 145 Grain Full Metal Jacket 20 Rounds - Free Shipping with Buyer's Club! $1.00/rd $19.99 In Stock 12d ago 53m ago Outdoor Limited
Fiocchi Range Dynamics 150gr FMJBT .300 Blackout Ammo, 100/Box $1.00/rd $100.00 In Stock 4m ago 4m ago Firearms Depot
LAX Ammunition Factory New 300 AAC BLACKOUT 147 GR FMJ 250 RDS W/FREE AMMO CAN $1.00/rd $249.95 In Stock 8h ago 2m ago Lax Ammunition
20 Round Box - 300 AAC Blackout 145 Grain FMJ Steel Case Wolf Ammo by Barnaul $1.05/rd $20.95 62 20d ago 6m ago SGAmmo
300 AAC Blackout - 145 Grain FMJ - Wolf - 20 Rounds 645611308673 $1.05/rd $21.00 136 1d ago 45m ago Lucky Gunner
.300 AAC Blackout - 130 grain Speer® Varmint Hollow Points - 1000 Cartridges 785104500952 $1.05/rd $1049.99 In Stock 21d ago 56m ago Tacoma Ammunition Company
.300 AAC Blackout - 125 grain Hornady FMJ - 1000 Cartridges 785104500976 $1.06/rd $1064.99 In Stock 21d ago 56m ago Tacoma Ammunition Company
Freedom Munitions New 300 Blackout 147 GR FMJ 50 ROUNDS $1.07/rd $53.50 In Stock 8h ago 2m ago Lax Ammunition
.300 AAC Blackout - 125 grain Hornady HP - 1000 Cartridges 785104500983 $1.07/rd $1069.99 In Stock 21d ago 56m ago Tacoma Ammunition Company
300 AAC Blackout - 145 Grain FMJ - Barnaul - 500 Rounds $1.08/rd $540.00 29 9d ago 45m ago Lucky Gunner
.300 AAC Blackout - 110 grain Ervin Frangible E Bullet - 1000 Cartridges 785104501003 $1.09/rd $1089.99 In Stock 21d ago 56m ago Tacoma Ammunition Company
.300 AAC Blackout - 150 grain Hornady FMJ - 1000 Cartridges 785104500990 $1.10/rd $1099.99 In Stock 21d ago 56m ago Tacoma Ammunition Company
300 AAC Blackout - 145 Grain FMJ - Barnaul - 20 Rounds 4607094863717 $1.12/rd $22.50 15 1d ago 45m ago Lucky Gunner
300BLKFMJ1 - Wolf 300 Blackout 145gr FMJ Steel Case (20 Rounds) $1.15/rd $22.99 In Stock 33d ago 40m ago Top Gun Ammo
Wolf 300 Blackout Ammo - 20 Rounds of 145 Grain FMJ Ammunition 645611308673 $1.15/rd $22.99 In Stock 17d ago 40m ago Ammo.com
Herter's Target Centerfire Rifle Ammo .300 AAC Blackout 125 Grain SKU:2672459 $1.15/rd $22.99 In Stock 2d ago 25m ago Cabelas
Herter's Target Centerfire Rifle Ammo .300 AAC Blackout 125 Grain SKU:2672459 $1.15/rd $22.99 In Stock 2d ago 2h ago Bass Pro Shops
Barnaul 300 Blackout Ammo - 20 Rounds of 145 Grain FMJ Ammunition 4607094863717 $1.15/rd $22.99 In Stock 34d ago 40m ago Ammo.com
Armscor .300 Blackout 147GR Full Metal Jacket - Brass - 150rds - FREE AMMO CAN $1.15/rd $172.50 In Stock 23d ago 13m ago 2A Warehouse
Barnaul 300 AAC Blackout BARN300BLKFMJ145 145 Grain Full Metal Jacket 20 Rounds - Free Shipping with Buyer's Club! $1.18/rd $23.49 In Stock 27d ago 53m ago Outdoor Limited
300 AAC Blackout - 150 Grain FMJ - Fiocchi - 50 Rounds 762344711010 $1.18/rd $59.00 39 1d ago 45m ago Lucky Gunner
50 Round Box - 300 Blackout 123 Grain FMJ Magtech Ammo - 300BLKB - Limit 4 $1.20/rd $59.95 97 3d ago 6m ago SGAmmo
Barnaul .300 AAC Blackout 145 FMJ Polycoated Steel Case Cartridges 20 Rounds 4607094863717 $1.20/rd $23.99 In Stock 43d ago 9m ago Fin Feather Fur Outfitters
Corbon Performance Match 300 AAC Blackout Ammunition PM300AAC150 150 Grain Full Metal Jacket 20 Rounds - Free Shipping with Buyer's Club! $1.20/rd $23.99 In Stock 3d ago 53m ago Outdoor Limited
MagTech 300BLK 123GR FMJ 50 ROUNDS 754908209613 $1.20/rd $59.99 In Stock 1d ago 44m ago GrabAGun.com
Armscor .300 Blackout 147GR Full Metal Jacket - Brass - 100 Round Box $1.20/rd $120.00 In Stock 23d ago 13m ago 2A Warehouse
Magtech First Defense 300BLK 200gr FMJ 300BLKSUBA 50rd $1.25/rd $62.47 In Stock 22h ago 29m ago Gun Buyer
Sellier & Bellot 300 BLK 147GR FMJ 20Rd Box SB300BLKB $1.25/rd $24.99 In Stock 2d ago 29m ago Gun Buyer
Federal American Eagle 300 Blackout 150gr FMJ 40rds AE300BLK1 604544617009 $1.25/rd $50.00 In Stock 2d ago 48m ago Weaponspro
20 Round Box - 300 AAC Blackout 200 Grain SUBSONIC FMJ Ammo by Sellier Bellot - SB300BLKSUBA - Limit 10 $1.30/rd $25.95 266 3d ago 6m ago SGAmmo
Insurgent .300 AAC 220gr Subsonic HPBT Nosler (30 Rounds) $1.30/rd $38.99 In Stock 2d ago 40m ago Top Gun Ammo
MagTech .300 AAC Blackout 100 Rounds (2x50) of 123 Grain Super Sonic. $1.31/rd $131.00 In Stock 16d ago 3m ago Ammo Imports
.300 AAC Blackout - 155 grain Hornady HPBT - 100 Cartridges 785104500921 $1.33/rd $132.99 In Stock 21d ago 56m ago Tacoma Ammunition Company
.300 AAC Blackout - 125 grain Hornady FMJ - 100 Cartridges 785104500761 $1.33/rd $132.99 In Stock 21d ago 56m ago Tacoma Ammunition Company
.300 AAC Blackout - 130 grain Speer® Varmint Hollow Points - 100 Cartridges 785104500716 $1.33/rd $132.99 In Stock 21d ago 56m ago Tacoma Ammunition Company
.300 AAC Blackout - 125 grain Hornady FMJ - 20 Cartridges 785104500662 $1.35/rd $26.99 In Stock 21d ago 56m ago Tacoma Ammunition Company
HSM Ammo 300 Blackout 150 Grain FMJ 20 Rounds [300BLK9N] 810742028244 $1.35/rd $26.99 In Stock 12h ago 92d ago Ammo Freedom
.300 AAC Blackout - 125 grain Hornady HP - 20 Cartridges 785104500655 $1.35/rd $26.99 In Stock 21d ago 56m ago Tacoma Ammunition Company
Sellier & Bellot Ammo 300 Blackout 200 Grain FMJ Subsonic 20 Rounds [300BLKSUBA] 754908512461 $1.35/rd $26.99 In Stock 12h ago 92d ago Ammo Freedom
.300 AAC Blackout - 125 grain Speer TNT Varmint HP - 100 Cartridges 785104500693 $1.37/rd $136.99 In Stock 21d ago 56m ago Tacoma Ammunition Company

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.
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