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
BARNAUL STEEL CASE 300 BLACKOUT 145GR FMJ 20 BOX $0.59/rd $11.88 In Stock 49d ago 3m ago BattleHawk Armory
STRYKER: 300 AAC BLACKOUT 147 GR FMJ - 400 CT $0.60/rd $240.00 In Stock 2d ago 18m ago The American Marksman
STRYKER: 300 AAC BLACKOUT 147 GR FMJ - 200 CT $0.62/rd $124.00 In Stock 2d ago 18m ago The American Marksman
Wolf Polyformance Steel Ammo 300 AAC Blackout 145gr FMJ Rifle Ammunition - 20 RD BOX $0.65/rd $12.99 In Stock 6d ago 3m ago BattleHawk Armory
Tula Ammo Premium Grade - .300 AAC Blackout 125 Grain FMJ - Zinc Plated Steel Case, Non-Corrosive, by Sergeant Major Munition - 500 Rounds - 300JBZNC $0.66/rd $329.99 In Stock 68d ago 50m ago Classic Firearms
STRYKER: 300 AAC BLACKOUT M62 TRACER 142 GR FMJ - 400 CT $0.70/rd $280.00 In Stock 17d ago 18m ago The American Marksman
Barnaul 300 AAC Blackout BARN300BLKFMJ145 145 Grain Full Metal Jacket CASE 500 Rounds - Free Shipping with Buyer's Club! $0.73/rd $364.99 In Stock 22d ago 54m ago Outdoor Limited
Sergeant Major Munitions 300 AAC Blackout Brass 125 Grain FMJ (Box of 20) $0.75/rd $14.98 In Stock 37d ago 14m ago The Castle Arms
Barnaul 300 AAC Blackout BARN300BLKFMJ145 145 Grain Full Metal Jacket 20 Rounds - Free Shipping with Buyer's Club! 4607094863717 $0.75/rd $14.99 In Stock 51d ago 54m ago Outdoor Limited
300 AAC Blackout 145gr FMJ Wolf Polyformance Ammo Box (20 rds) $0.75/rd $14.99 In Stock 107d ago 34s ago The Armory
300 AAC Blackout 145gr FMJ Wolf Polyformance Ammo Brick (200 rds) $0.75/rd $149.99 In Stock 12d ago 34s ago The Armory
500 Round Case - 300 AAC Blackout 145 Grain FMJ Steel Case Wolf Ammo by Barnaul $0.76/rd $379.75 13 76d ago 7m ago SGAmmo
Wolf 300BLKFMJ1 Polyformance .300 Blackout 145 GR FMJ Steel Case, Non-Corrosive - 500 Round Case $0.76/rd $379.99 In Stock 60d ago 50m ago Classic Firearms
WPA POLYFORMANCE 300 AAC BLACKOUT AMMO (Shipped from East Coast Warehouse) 20 rounds 645611308673 $0.77/rd $15.39 In Stock 23d ago 16m ago Ammo Supply Warehouse
WPA POLYFORMANCE 300 AAC BLACKOUT AMMO (Shipped from West Coast Warehouse) 20 rounds 645611308673 $0.77/rd $15.39 In Stock 23d ago 22m ago Ammo Supply Warehouse
WOLF Polyformance 300 Blackout 145gr FMJ 500rd Steel Case Rifle Ammo (300BLKFMJ1-CASE) $0.78/rd $389.00 In Stock 8d ago 35m ago Gritr Sports
20 Round Box - 300 AAC Blackout 145 Grain FMJ Steel Case Wolf Ammo by Barnaul $0.80/rd $15.95 148 76d ago 7m ago SGAmmo
AMMO INC 300 BLACKOUT 150 gr FMJ Full Metal Jacket Brass Ammunition 200rd Can $0.80/rd $159.88 In Stock 37d ago 3m ago BattleHawk Armory
Sellier & Bellot – 300 Blackout – 147 Grain – FMJ – 1,000 Rounds $0.80/rd $799.00 In Stock 1d ago 16m ago True Shot Gun Club
Wolf Polyformance 300 Blackout Ammo 145 Grain FMJ Steel Case Box of 20 - steel case 645611308673 $0.80/rd $15.99 In Stock 3d ago 34m ago Target Sports USA
Wolf 300 Blackout Ammunition WOLF300BLK145 145 Grain Full Metal Jacket 20 Rounds - Free Shipping with Buyer's Club! 645611308673 $0.80/rd $15.99 In Stock 101d ago 54m ago Outdoor Limited
Sellier & Bellot – 300 Blackout – 147 Grain – FMJ – 20 Rounds $0.80/rd $15.99 In Stock 1d ago 16m ago True Shot Gun Club
Fiocchi 300 Blackout Training Dynamics 150 gr Full Metal Jacket Boat Tail (FMJBT) 50 Box $0.80/rd $39.99 In Stock 42d ago 3m ago BattleHawk Armory
AMMO INC 300 BLK 155gr BTHP BRASS AMMUNITION - 200rd AMMO CAN $0.80/rd $159.99 In Stock 37d ago 3m ago BattleHawk Armory
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 3d ago 34m ago Target Sports USA
Sellier & Bellot – 300 Blackout – 147 Grain – FMJ – 500 Rounds $0.80/rd $399.75 In Stock 1d ago 16m ago True Shot Gun Club
Magtech – 300 Blackout – 123 Grain – FMJ – 1000 Rounds $0.80/rd $799.99 In Stock 4d ago 16m ago True Shot Gun Club
300 BLACKOUT 125 GRAIN FMJ SUPERSONIC 20 rounds $0.80/rd $16.09 In Stock 15d ago 18m ago Buckeye Shooting Center
Wolf 300 AAC Blackout - FMJ - Steel Cased - 145 Grain - 20 Rounds $0.82/rd $16.29 In Stock 4d ago 51m ago Steel City Ammo
Magtech – 300 Blackout – 123 Grain – FMJ – 50 Rounds $0.82/rd $40.99 In Stock 4d ago 16m ago True Shot Gun Club
Ammo Inc. – 300 Blackout – 110 Grain – V-MAX – 20 Rounds $0.82/rd $16.49 In Stock 3d ago 16m ago True Shot Gun Club
Winchester 300 AAC BLACKOUT 125 GR Open Tip Boat Tail 20 rounds Ready to ship Limit 10 per purchase $0.84/rd $16.75 In Stock 10d ago 10m ago 300blackoutclub.com
WOLF POLYFORMANCE .300 blackout 145 grain full metal jacket (fmj) 20 rounds 645611308673 $0.85/rd $16.99 In Stock 5d ago 54m ago Guns.com
Armscor 300 AAC Blackout, 147 Grain, Full Metal Jacket, 20 Round Box FAC300AAC-1N 812285021089 $0.85/rd $17.00 In Stock 8d ago 2h ago Texas Hunting Equipment
Winchester 300 Blackout 125GR Open Tip 20rd Box - USA300BLK $0.85/rd $17.00 In Stock 9h ago 10m ago 2A Warehouse
.300 Blackout 150GR FMJ Ammo Inc. (100 rounds) $0.85/rd $84.99 In Stock 30d ago 6m ago Canoe Club USA
300 AAC Blackout 145gr FMJ Wolf Polyformance Ammo in The Armory Black Range Bag (200 rds) $0.85/rd $169.99 In Stock 32d ago 34s ago The Armory
300 AAC Blackout 145gr FMJ Wolf Polyformance Ammo in The Armory Black Python Range Bag (200 rds) $0.85/rd $169.99 In Stock 32d ago 34s ago The Armory
Federal 300 Blackout Ammo 150 grain FMJ Case of 500 Rounds Bulk AE300BLK1 $0.86/rd $429.00 In Stock 24d ago 56m ago Gunprime
Fiocchi 300BLKC Training Dynamics 300 Blackout 150 gr Full Metal Jacket Boat Tail (FMJBT) 50 Bx/ 10 Cs $0.87/rd $43.43 In Stock 37d ago 29m ago Locked Loaded
Armscor 300 Blackout - 147 Grain - FMJ - 20 Rounds $0.88/rd $17.49 In Stock 1d ago 51m ago Steel City Ammo
Winchester USA .300 Blackout 147gr. FMJ 20rd Box #USA300B147 $0.88/rd $17.50 In Stock 11d ago 29m ago Locked Loaded
300 AAC Blackout - 150 Grain FMJ - Corbon Performance Match - 20 Rounds 851383008073 $0.88/rd $17.50 119 3d ago 2h ago Lucky Gunner
300 AAC Blackout - 150 gr FMJ - Federal American Eagle (AE300BLK1) - 500 Rounds $0.88/rd $439.00 In Stock 4d ago 25m ago Bulk Munitions
Magtech 300 AAC Blackout MT300BLKB 123 Grain Full Metal Jacket CASE 1,000 rounds - Free Shipping with Buyer's Club! 1000 rounds 754908209606 $0.88/rd $879.00 In Stock 36d ago 54m ago Outdoor Limited
Fiocchi Shooting Dynamics Rifle 300BLKC 50 rounds 762344711010 $0.88/rd $43.99 In Stock 1d ago 24m ago DeeseFirearms.com
Fiocchi 300BLKC Training Dynamics 300 Blackout 150 gr Full Metal Jacket Boat-Tail (FMJBT) 50 Bx 762344711010 $0.88/rd $43.99 In Stock 5d ago 21h ago Smokin’ Guns
Barnaul Ammo BARNAUL 300AAC BLACKOUT 145GR FMJ 20 rounds 4607094863717 $0.90/rd $17.95 In Stock 157d ago 24m ago DeeseFirearms.com
Fiocchi Range Dynamics 300 Blackout Ammo 150 grain FMJ BT Case of 500 Rounds Bulk 300BLKC $0.90/rd $449.00 In Stock 12d ago 56m ago Gunprime
1000 Round Case - 300 AAC Blackout 147 Grain FMJ Ammo by Sellier Bellot - SB300BLKB $0.90/rd $897.50 5 10d ago 7m ago SGAmmo

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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