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 20 Rounds Ammunition Armscor Precision Inc 147 Grain Full Metal Jacket $0.53/rd $10.55 In Stock 2h ago 7d ago Wholesale Hunter
Factory 2nds: Stryker 300 AAC Blackout 147 gr FMJ - 400 ct. $0.53/rd $212.40 In Stock 11d ago 53m ago The American Marksman
120 ROUNDS 300 AAC BLACKOUT 125 GR FMJ ZINC PLATED STEEL 120 rounds 689481697116 $0.54/rd $64.99 In Stock 4d ago 7m ago Tulammozone
Stryker 300 AAC Blackout 150 gr Soft-Point - 400 ct. $0.55/rd $220.00 In Stock 13d ago 53m ago The American Marksman
AMMO INC AMO SIGNATURE SERIES 300 BLACKOUT 150GR FMJ 20RD ( 25 PER CASE ) 818778021826 $0.57/rd $11.35 In Stock 10d ago 4m ago Locked Loaded
Armscor FAC300AAC1N 300 AAC Blackout/Whisper (7.62X35mm) 147 GR Full Metal Jacket 20 Bx/ 10 Cs 812285021089 $0.58/rd $11.54 In Stock 5d ago 56m ago Foundry Outdoors
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs 812285021089 $0.58/rd $11.57 In Stock 5d ago 4m ago Locked Loaded
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs 812285021089 $0.58/rd $11.60 In Stock 4d ago 1h ago Defense Depot
300 Blackout, 147GR, Mark-1 - 500CT $0.58/rd $290.50 In Stock 16d ago 4m ago Mark-1 Ammo
Stryker 300 AAC Blackout 147 gr FMJ - 400 ct. $0.59/rd $236.00 In Stock 11d ago 53m ago The American Marksman
AMMO INC AMO SIGNATURE SERIES 300 BLACKOUT 150GR FMJ 20RD ( 25 PER CASE ) 818778021826 $0.60/rd $11.98 In Stock 11d ago 1h ago Defense Depot
AMMO INC .300 BLACKOUT AMMO 150GR FMJ 200 rounds 818778021826 $0.60/rd $119.80 In Stock 11d ago 1h ago Sentry Ammo
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 rounds 812285021089 $0.60/rd $11.99 In Stock 5d ago 17m ago GunZoneDeals
Federal: American Eagle 300 Blackout, 150gr Boat-Tail FMJ, 20/Box 604544617009 $0.60/rd $12.00 In Stock 55d ago 34m ago Mile High Shooting
Stryker 300 AAC Blackout 150 gr Soft-Point - 50 ct. $0.60/rd $30.00 In Stock 10d ago 53m ago The American Marksman
Ammo Inc Range Pack .300 Blackout Ammo 150gr FMJ, 200rds - 300B150FMJ-A200 $0.60/rd $119.99 In Stock 3d ago 8m ago Palmetto
Fiocchi 300 AAC Blackout Ammunition FI300BLKC 150 Grain Full Metal Jacket Boat Tail 500 rounds $0.60/rd $299.99 In Stock 20d ago 58m ago Outdoor Limited
RangeTime 300 Blackout Rangetime 150 grain 500 round case 781100777091 $0.60/rd $299.99 In Stock 235d ago 34m ago FlipAmmo
AMMO INC AMO SIGNATURE SERIES 300 BLACKOUT 150GR FMJ 20RD ( 25 PER CASE ) 818778021826 $0.60/rd $12.08 In Stock 10d ago 13m ago Dack Outdoors
Armscor USA 300 Blackout Ammo 147 grain FMJ Case of 1200 Rounds 50446 $0.61/rd $729.00 In Stock 5d ago 1h ago Gunprime
Ammo Inc 300blk 150gr Fmj 20/500 818778021826 $0.61/rd $12.17 In Stock 10d ago 4m ago Tactical Surplus USA
Stryker 300 AAC Blackout 147 gr FMJ - 50 ct. $0.61/rd $30.50 In Stock 7d ago 53m ago The American Marksman
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 rounds 812285021089 $0.61/rd $12.24 In Stock 4d ago 1h ago Sentry Ammo
Armscor 300 AAC Blackout Ammunition ARM50446 147 Grain Full Metal Jacket Case of 1200 Rounds $0.62/rd $739.00 In Stock 52d ago 58m ago Outdoor Limited
Armscor FAC300AAC1N USA 300 Blackout 147 Gr Full Metal Jacket (FMJ) 20 Rounds Per Box 812285021089 $0.62/rd $12.34 In Stock 5d ago 22m ago Beebe Family Arms & Munitions
Ammo Inc 10180TMCA50 Signature 10mm Auto 180 gr Total Metal Case 50 Per Box $0.62/rd $30.99 In Stock 12h ago 11m ago DEGUNS.NET
Fiocchi 300 AAC Blackout Ammunition FI300BLKC 150 Grain Full Metal Jacket Boat Tail 50 rounds 762344711010 $0.62/rd $30.99 In Stock 27d ago 58m ago Outdoor Limited
Armscor 300 AAC Blackout Ammunition ARM50446 147 Grain Full Metal Jacket 100 Rounds 4806015504467 $0.62/rd $61.99 In Stock 52d ago 58m ago Outdoor Limited
Armscor 300 AAC Blackout Ammunition ARM50446 147 Grain Full Metal Jacket Pack 500 Rounds $0.62/rd $309.95 In Stock 52d ago 58m ago Outdoor Limited
Armscor 300 AAC Blackout Ammunition FAC300AAC1N 147 Grain Full Metal Jacket 20 Rounds 812285021089 $0.62/rd $12.49 In Stock 49d ago 58m ago Outdoor Limited
Ammo Inc. Signature Brass .300 Blackout 150 Grain 20-Rounds FMJ 818778021826 $0.63/rd $12.59 In Stock 14d ago 50m ago GrabAGun.com
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs 812285021089 $0.63/rd $12.60 In Stock 5d ago 1h ago Skogen’s Gun Supply
Armscor FAC300AAC1N USA Competition 300 Blackout 147 gr Full Metal Jacket (FMJ) 20rd Box 812285021089 $0.63/rd $12.62 In Stock 5d ago 3m ago GunStuff TV
300 Blackout, 147GR, Mark-1 - 250CT $0.64/rd $159.00 In Stock 16d ago 4m ago Mark-1 Ammo
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx 812285021089 $0.64/rd $12.73 In Stock 5d ago 18m ago Firearms Depot
Ammo Inc. Signature, .300 AAC Blackout, FMJ, 147 Grain, 20 Rounds 818778021826 $0.64/rd $12.74 In Stock 7d ago 18m ago Firearms Depot
AMMO INC AMO SIGNATURE SERIES 300 BLACKOUT 150GR FMJ 20RD ( 25 PER CASE ) 818778021826 $0.64/rd $12.75 In Stock 7d ago 2h ago Huligan Arms
AMMO INC AMO SIGNATURE SERIES 300 BLACKOUT 150GR FMJ 20RD ( 25 PER CASE ) 818778021826 $0.64/rd $12.75 In Stock 10d ago 1h ago Skogen’s Gun Supply
RangeTime 300 Blackout Rangetime 150 grain FMJ 50 Round Box- $11.99 Flat Shipping unlimited boxes! 781100777091 $0.64/rd $32.00 In Stock 41d ago 34m ago FlipAmmo
Ammo Inc .300 Blackout 150gr FMJ Ammo500-Round Case 818778021826 $0.65/rd $322.99 In Stock 4d ago 2h ago The Mag Shack
Ammo Inc. Signature .300 Blackout 150 Grain FMJ 20 Round Box $0.65/rd $12.95 In Stock 11d ago 28m ago Shark Coast Tactical
AMMO INCORPORATED 300B150FMJA20 818778021826 $0.65/rd $12.99 In Stock 4d ago 10m ago Charter Tactical
Barnes: 300BLK, 120gr, JHP FB, 20/Box 716876120307 $0.65/rd $12.99 In Stock 55d ago 34m ago Mile High Shooting
Ammo Inc 300 Blackout 150 Gr Full Metal Jacket Brass Ammunition 20rds 818778021826 $0.65/rd $12.99 In Stock 20d ago 8m ago BattleHawk Armory
WOLF - 300 AAC Blackout 145gr Full Metal Jacket Bimetal 20/Box 645611308673 $0.65/rd $13.00 In Stock 3d ago 1h ago Brownells
Armscor USA .300 Blackout 147 Grain 20-Rounds FMJ 812285021089 $0.66/rd $13.09 In Stock 5d ago 50m ago GrabAGun.com
Armscor 300 Blackout 147 Grain FMJ 20 Round Box FAC300AAC-1N $0.66/rd $13.21 In Stock 4d ago 44m ago Gun Buyer
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20rd BOX 812285021089 $0.66/rd $13.22 In Stock 5d ago 8m ago BattleHawk Armory
ARMSCOR 300 AAC Blackout 147Gr FMJ 20rd 812285021089 $0.67/rd $13.46 In Stock 5d ago 3m ago KYGUNCO
Capital Cartridge .300 Blackout 200GR FMJ - SUBSONIC - REMAN - 200 Rounds With Free Ammo Can $0.68/rd $134.99 In Stock 5d ago 30m ago 2A Warehouse

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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