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
Capital Cartridge .300 Blackout 147GR FMJ - REMAN - 300 Rounds With Free Ammo Can $0.50/rd $149.99 In Stock 15d ago 29m ago 2A Warehouse
Capital Cartridge .300 Blackout 147GR FMJ - REMAN - 50RD Box $0.52/rd $26.25 In Stock 15d ago 29m ago 2A Warehouse
Stryker 300 AAC Blackout 147 gr FMJ - 400 ct. $0.59/rd $236.00 In Stock 110d ago 21m ago The American Marksman
Wolf - 300 Blackout - 145 Grain - FMJ - Steel Case - 500 $0.59/rd $294.99 In Stock 21d ago 1h ago True Shot Ammo
120 ROUNDS 300 AAC BLACKOUT 125 GR FMJ ZINC PLATED STEEL 120 rounds 689481697116 $0.59/rd $71.00 In Stock 7d ago 1h ago Tulammozone
250 Rounds of American Quality .300 Blackout Ammunition Bulk Pack FMJ 147 Grains N300147VP250 250 rounds 04806015501886 $0.60/rd $149.89 In Stock 49d ago 7m ago Cheaper Than Dirt
RangeTime 300 Blackout Rangetime 150 grain 500 round case 781100777091 $0.60/rd $299.99 In Stock 13d ago 8m ago FlipAmmo
Ammo Inc .300 Blackout 150gr FMJ Ammo500-Round Case 818778021826 $0.60/rd $299.99 In Stock 9h ago 53m ago The Mag Shack
Stryker 300 AAC Blackout 147 gr FMJ - 50 ct. $0.61/rd $30.50 In Stock 21d ago 21m ago The American Marksman
AMMO INC .300 BLACKOUT AMMO 150GR FMJ 200 rounds 818778021826 $0.62/rd $123.00 In Stock 7h ago 23m ago Sentry Ammo
AMMO Inc 150gr 300 Blackout Bulk PackagingCase of 1200 FREE Shipping $0.62/rd $743.39 In Stock 6d ago 55m ago Wild Horse Ammo
Fiocchi Range Dynamics 300 Blackout 150 gr 1950 fps Full Metal Jacket Boat-Tail 300BLKC 50 Rounds $0.62/rd $30.99 In Stock 33d ago 2m ago BH Ammo
RangeTime 300 Blackout Rangetime 150 grain FMJ 50 Round Box 781100777091 $0.63/rd $31.50 In Stock 13d ago 8m ago FlipAmmo
AMMO Inc 150gr 300 Blackout Bulk PackagingBattle Pack of 200 $0.63/rd $125.90 In Stock 6d ago 55m ago Wild Horse Ammo
American Quality Ammunition 300 Blackout 147 grain FMJ Loose 250 rd x 4 FREE SHIPPING(1000 rds) $0.63/rd $629.95 In Stock 2h ago 29m ago Rivertown Munitions
AMMO INC AMO SIGNATURE SERIES 300 BLACKOUT 150GR FMJ 20RD ( 25 PER CASE ) 818778021826 $0.63/rd $12.61 In Stock 4d ago 23m ago Locked Loaded
Armscor USA 300 Blackout Ammo 147 grain FMJ Case of 200 Rounds FAC300AAC1N $0.64/rd $129.00 In Stock 40d ago 58m ago Gunprime
Ammo Inc. Signature .300 Blackout 150 Grain FMJ 20 Round Box $0.65/rd $12.95 In Stock 110d ago 10m ago Shark Coast Tactical
20 Round Box - 300 Blackout 150 Grain FMJ Ammo Incorporated Ammo - 300B150FMJ-A20 $0.65/rd $12.95 74 7d ago 20m ago SGAmmo
Armscor USA .300 Blackout Ammunition 200 Rounds, FMJ, 147 Grain $0.65/rd $129.89 In Stock 17d ago 7m ago Cheaper Than Dirt
AMMO INCORPORATED 300B150FMJA20 818778021826 $0.65/rd $12.99 In Stock 4d ago 7m ago Charter Tactical
Ammo Inc 300 Blackout 150 Gr Full Metal Jacket Brass Ammunition 20rd BOX 818778021826 $0.65/rd $12.99 In Stock 2d ago 39s ago BattleHawk Armory
AMMO INCORPORATED 300B150FMJA20 818778021826 $0.65/rd $12.99 In Stock 4d ago 8m ago Hot Ammo
Wolf - 300 Blackout - 145 Grain - FMJ - Steel Case - 20 $0.65/rd $12.99 In Stock 21d ago 1h ago True Shot Ammo
AAC 300 Blackout Ammo 110 Grain V-Max 300rd Bundle $0.65/rd $194.85 In Stock 6d ago 7m ago Palmetto
AMMO INC AMO SIGNATURE SERIES 300 BLACKOUT 150GR FMJ 20RD ( 25 PER CASE ) 818778021826 $0.65/rd $13.01 In Stock 11h ago 31m ago Dack Outdoors
Armscor 300 AAC 147gr FMJ /20 $0.65/rd $13.06 In Stock 42d ago 1h ago Red River Reloading
Armscor 300 AAC 147gr FMJ /20 (Buy 4 $13.06 Each) 80 rounds $0.65/rd $52.24 In Stock 16d ago 1h ago Red River Reloading
Ammo Inc 300blk 150gr Fmj 20/500 818778021826 $0.66/rd $13.10 In Stock 4d ago 2h ago Tactical Surplus USA
Sellier & Bellot 300BLKA Rifle 300 Blackout 124 gr Full Metal Jacket 20 Bx/ 50 Cs 754908512447 $0.66/rd $13.29 In Stock 4d ago 23m ago Locked Loaded
Sellier & Bellot 300BLKA Rifle 300 Blackout 124 gr Full Metal Jacket 20 Bx/ 50 Cs 754908512447 $0.67/rd $13.33 In Stock 4d ago 19m ago Defense Depot
Armscor Ammo .300Aac Blackout 147gr. FMJ 20Rd Box 812285021089 $0.67/rd $13.34 In Stock 21d ago 2m ago Foundry Outdoors
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs 812285021089 $0.67/rd $13.35 In Stock 6d ago 23m ago Locked Loaded
Fiocchi Range Dynamics 300 Blackout 150 gr 1950 fps Full Metal Jacket Boat-Tail 300BLKC 500 Rounds $0.67/rd $333.99 In Stock 33d ago 2m ago BH Ammo
Armscor .300 AAC Blackout 147gr FMJ /100 $0.67/rd $66.91 In Stock 42d ago 1h ago Red River Reloading
Sellier & Bellot 300BLKA Rifle 300 Blackout 124 gr Full Metal Jacket 20 Bx/ 50 Cs 754908512447 $0.67/rd $13.44 In Stock 5d ago 31m ago Dack Outdoors
AMMO INC AMO SIGNATURE SERIES 300 BLACKOUT 150GR FMJ 20RD ( 25 PER CASE ) 818778021826 $0.67/rd $13.45 In Stock 3d ago 4m ago Huligan Arms
Fiocchi Range Dynamics 300 Blackout 150 gr 1950 fps Full Metal Jacket Boat-Tail 300BLKC 250 Rounds $0.68/rd $168.99 In Stock 33d ago 2m ago BH Ammo
WOLF AMO 300 BLACKOUT 145GR FMJ STEEL CASE 20RD ( 25 BOXES PER CASE ) 645611308673 $0.68/rd $13.55 In Stock 5d ago 31m ago Dack Outdoors
Sellier & Bellot (S&B) 300BLKA Rifle 300 Blackout 124 gr Full Metal Jacket 20 rounds 754908512447 $0.68/rd $13.56 In Stock 6d ago 23m ago Sentry Ammo
Sellier & Bellot SB300BLKA Rifle 300 Blackout 124 gr Full Metal Jacket 20 Per Box/ 50 Case 100 Rounds $0.68/rd $67.99 In Stock 10d ago 2m ago BH Ammo
BARNAUL RIFLE AMMO BULK (200 ROUNDS) .300 aac blackout 145 grain full metal jacket (fmj) 200 rounds 4607094863717-10 $0.68/rd $135.99 In Stock 41d ago 6m ago Guns.com
Armscor 300 Blackout 147 grain FMJ (250 Rounds loose box) $0.68/rd $169.95 In Stock 2h ago 29m ago Rivertown Munitions
Sellier & Bellot - 300 Blackout - 124 Grain - FMJ - 500 $0.68/rd $339.99 In Stock 10d ago 1h ago True Shot Ammo
300 AAC Blackout - 150 Grain FMJ - Fiocchi - 500 Rounds 762344863580 $0.68/rd $340.00 59 3d ago 20m ago Lucky Gunner
Wolf Ammo .300 AAC Blackout 145gr FMJ Bimetal Steel Cased /20 (Buy 4 $13.64 Each) 80 rounds $0.68/rd $54.56 In Stock 16d ago 1h ago Red River Reloading
Sellier & Bellot 300BLKB Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 50 Cs 754908512454 $0.69/rd $13.79 In Stock 19d ago 23m ago Locked Loaded
Sellier Bellot Rifle, 300 Blackout, 147 Grain, Full Metal Jacket, 20 Round Box SB300BLKB 754908512454 $0.69/rd $13.79 In Stock 57d ago 2m ago Foundry Outdoors
Sellier Bellot Rifle, 300 Blackout, 124 Grain, Full Metal Jacket, 20 Round Box SB300BLKA 754908512447 $0.69/rd $13.79 In Stock 57d ago 2m ago Foundry Outdoors
300 AAC Blackout - 150 Grain FMJ - Ammo Inc. - 500 Rounds 0213202316167 $0.69/rd $345.00 59 7d ago 20m 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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