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
Wolf Polyformance 300 Blackout 145 Grain Full Metal Jacket 500 Rounds $0.74/rd $369.99 In Stock 7d ago 44m ago Smoky Mountain Knife Works
Barnaul Ammo .300 AAC BLACKOUT 145 GR STEEL CASING 20 rounds 4607094863717 $0.78/rd $15.50 In Stock 3d ago 11m ago CJ Tactical Supply
Wolf Polyformance 300 Blackout Ammo 145 Grain FMJ Steel Case Box of 20 - steel case 645611308673 $0.80/rd $15.99 In Stock 4d ago 34m ago Target Sports USA
Wolf Polyformance 300 Blackout Ammo 145 Grain FMJ Steel Case Case of 500 (25 Boxes of 20) - Free Shipping - steel case 645611308673 $0.80/rd $399.75 In Stock 4d ago 34m ago Target Sports USA
300 AAC Blackout 145gr FMJ Wolf Polyformance Ammo Case (500 rds) $0.80/rd $399.99 In Stock 19d ago 8m ago The Armory
300 AAC Blackout 145gr FMJ Wolf Polyformance Ammo Case (1000 rds) $0.80/rd $799.50 In Stock 18d ago 8m ago The Armory
500 Round Case of Wolf 300 AAC Blackout 145 Grain FMJ Steel Case Ammo by Barnaul - Free Shipping- 500 rounds $0.82/rd $409.00 In Stock 5d ago 17m ago Ammo Empire
Barnaul .300 AAC Blackout Ammunition 145 Grain FMJ Steel Case (20 Rounds) - SAME DAY SHIPPING! 4607094863717 $0.82/rd $16.40 In Stock 20h ago 10m ago Caliber Armory
Armscor .300 Blackout 147GR Full Metal Jacket - Brass - 150rds - FREE AMMO CAN $0.84/rd $125.99 In Stock 6d ago 21m ago 2A Warehouse
.300 AAC Blackout - 125 grain Hornady HP - 1000 Cartridges 785104500983 $0.84/rd $839.99 In Stock 18d ago 45m ago Tacoma Ammunition Company
.300 AAC Blackout - 150 grain Hornady FMJ - 1000 Cartridges 785104500990 $0.84/rd $839.99 In Stock 18d ago 45m ago Tacoma Ammunition Company
.300 AAC Blackout - 125 grain Hornady FMJ - 1000 Cartridges 785104500976 $0.84/rd $839.99 In Stock 18d ago 45m ago Tacoma Ammunition Company
BARNAUL STEEL CASE 300 BLACKOUT 145GR FMJ 20 BOX $0.85/rd $16.99 In Stock 22d ago 13m ago BattleHawk Armory
Barnaul – 300 Blackout – 145 Grain – FMJ – Steel Polycoated Case – 20 Rounds $0.85/rd $16.99 In Stock 2h ago 12m ago True Shot Gun Club
Barnaul Ammo BRN300BLKFMJ145 Rifle Ammo 300 Blackout 145 gr Full Metal Jacket (FMJ) 20rds - VETERAN OWNED BUSINESS 4607094863717 $0.87/rd $17.48 In Stock 21d ago 56m ago Madison Guns
FULL CASE - Barnaul Ammo BRN300BLKFMJ145 Rifle Ammo 300 Blackout 145 gr Full Metal Jacket (FMJ) 500rds - VETERAN OWNED BUSINESS 4607094863717 $0.87/rd $437.00 In Stock 8d ago 56m ago Madison Guns
Wolf .300 AAC BLACKOUT 145 GR STEEL CASING 20 rounds 645611308673 $0.88/rd $17.50 In Stock 10d ago 11m ago CJ Tactical Supply
.300 AAC Blackout - 125 grain Hornady FMJ - 500 Cartridges 785104500952 $0.88/rd $439.99 In Stock 12d ago 45m ago Tacoma Ammunition Company
300 AAC Blackout 145gr FMJ Wolf Polyformance Ammo Box (20 rds) $0.90/rd $17.99 In Stock 18d ago 8m ago The Armory
300BLKFMJ1 - Wolf 300 Blackout 145gr FMJ Steel Case (20 Rounds) 645611308673 $0.90/rd $17.99 In Stock 5d ago 37m ago Top Gun Ammo
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx 812285021089 $0.90/rd $17.99 In Stock 4d ago 6m ago Firearms Depot
SELLIER & BELLOT 300 Blackout 147 Grain FMJ Ammo 20 Round Box (SB300BLKB) $0.90/rd $17.99 In Stock 14d ago 7m ago Gritr Sports
.300 AAC Blackout - 110 grain Ervin Frangible E Bullet - 100 Cartridges 785104500723 $0.90/rd $89.99 In Stock 18d ago 45m ago Tacoma Ammunition Company
PPU PP300BF Standard Rifle 300 Blackout 125 gr Full Metal Jacket (FMJ) 20 Bx/ 50 Cs $0.92/rd $18.49 In Stock 2d ago 13m ago BattleHawk Armory
PPU 300 Blackout 125gr FMJ 20rds $0.92/rd $18.49 In Stock 6d ago 40m ago Military Shooters
.300 AAC Blackout - 125 grain Hornady® HP - 500 Cartridges 785104501010 $0.93/rd $463.31 In Stock 15d ago 45m ago Tacoma Ammunition Company
Prvi Partizan (PPU) – 300 Blackout – 125 Grain – FMJ – 20 Rounds $0.94/rd $18.78 In Stock 7d ago 29s ago True Shot Gun Club
Prvi Partizan (PPU) – 300 Blackout – 125 Grain – FMJ – 1,000 Rounds $0.94/rd $939.00 In Stock 7d ago 29s ago True Shot Gun Club
Barnaul Rifle Cartridges .300 AAC Blackout Ammunition 20 Rounds 145 Full Metal Jacket Polycoated Steel Case Cartridges. 4607094863717 $0.94/rd $18.83 In Stock 5d ago 22m ago Cheaper Than Dirt
WOLF Polyformance 300 Blackout 145gr FMJ 500rd Steel Case Rifle Ammo (300BLKFMJ1-CASE) $0.96/rd $479.99 In Stock 63d ago 7m ago Gritr Sports
.300 AAC Blackout - 155 grain Hornady HPBT - 100 Cartridges 785104500921 $0.97/rd $96.99 In Stock 49d ago 45m ago Tacoma Ammunition Company
.300 AAC Blackout - 125 grain Hornady FMJ - 100 Cartridges 785104500761 $0.97/rd $96.99 In Stock 49d ago 45m ago Tacoma Ammunition Company
300 AAC Blackout - 145 Grain FMJ - Wolf (Steel Case) - 500 Rounds 645611308680 $0.97/rd $485.00 25 1d ago 47m ago Lucky Gunner
Wolf 300 AAC Blackout Ammo - 500 Rounds of 145 Grain FMJ Ammunition 645611308680 $0.98/rd $489.00 In Stock 23d ago 7m ago Ammo.com
.300 AAC Blackout - 150 grain Hornady FMJ - 500 Cartridges 785104500846 $0.98/rd $489.99 In Stock 29d ago 45m ago Tacoma Ammunition Company
Armscor USA .300 Blackout Ammunition 20 Rounds FMJ 147 Grains AC300AAC-1N 812285021089 $1.00/rd $19.89 In Stock 4d ago 22m ago Cheaper Than Dirt
.300 AAC Blackout - 150 grain Hornady InterLock® SP - 500 Cartridges 785104500983 $1.00/rd $499.00 In Stock 14d ago 45m ago Tacoma Ammunition Company
PPU PP300BF Standard Rifle 300 Blackout 125 gr Full Metal Jacket (FMJ) 20 Bx 8605003812425 $1.00/rd $19.99 In Stock 4d ago 6m ago Firearms Depot
.300 AAC Blackout - 125 grain Hornady FMJ - 20 Cartridges 785104500662 $1.00/rd $19.99 In Stock 64d ago 45m ago Tacoma Ammunition Company
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs $1.00/rd $19.99 In Stock 30d ago 13m ago BattleHawk Armory
Barnaul 300 AAC Blackout BARN300BLKFMJ145 145 Grain Full Metal Jacket 20 Rounds - Free Shipping with Buyer's Club! $1.00/rd $19.99 In Stock 66d ago 26m ago Outdoor Limited
Prvi Partizan PPU Ammo 300 Blackout 125 Grain HPBT 20 Rounds [PP300BH] 8605003812432 $1.00/rd $19.99 In Stock 9h ago 188d ago Ammo Freedom
Barnaul .300 AAC Blackout 145 FMJ Polycoated Steel Case Cartridges 20 Rounds 4607094863717 $1.00/rd $19.99 In Stock 1d ago 60m ago Fin Feather Fur Outfitters
Armscor Ammo 300 Blackout 147 Grain FMJ 20 Rounds [FAC300AAC1N] 812285021089 $1.00/rd $19.99 In Stock 9h ago 188d ago Ammo Freedom
.300 AAC Blackout - 150 grain Hornady FMJ - 100 Cartridges 785104500709 $1.00/rd $99.99 In Stock 49d ago 45m ago Tacoma Ammunition Company
.300 AAC Blackout - 150 grain Hornady InterLock® SP - 100 Cartridges 785104500891 $1.00/rd $99.99 In Stock 49d ago 45m ago Tacoma Ammunition Company
PPU 300 AAC Blackout 125 GR HPBT Brass Case Hollow Point - 20rds - VETERAN OWNED BUSINESS 8605003812432 $1.08/rd $21.50 In Stock 4d ago 56m ago Madison Guns
HALF CASE - PPU 300 AAC Blackout 125 GR HPBT Brass Case Hollow Point - 500rds - VETERAN OWNED BUSINESS 8605003812432 $1.08/rd $537.50 In Stock 4d ago 56m ago Madison Guns
FULL CASE - PPU 300 AAC Blackout 125 GR HPBT Brass Case Hollow Point - 1000rds - VETERAN OWNED BUSINESS 8605003812432 $1.08/rd $1075.00 In Stock 4d ago 56m ago Madison Guns
300 AAC Blackout - 145 Grain FMJ - Wolf - 20 Rounds 645611308673 $1.09/rd $21.75 128 29d ago 47m 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.
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