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
Stryker 300 AAC Blackout 147 gr FMJ - 400 ct. $0.57/rd $228.00 In Stock 34d ago 38m ago The American Marksman
Veteran Ammo New 300 Blackout 150gr FMJ 1800 FPS 250/box 810108164456 Free S/H over $250 $0.58/rd $144.99 In Stock 13d ago 2m ago AE Armory
American Quality Ammunition 300 Blackout 147 grain FMJ Loose 250 rd x 4 FREE SHIPPING(1000 rds) $0.58/rd $579.99 In Stock 1h ago 1h ago Rivertown Munitions
120 ROUNDS 300 AAC BLACKOUT 125 GR FMJ ZINC PLATED STEEL 120 rounds 689481697116 $0.59/rd $71.00 In Stock 56d ago 30m 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 112d ago 48m ago Cheaper Than Dirt
15 Boxes of AAC 300 Blackout Ammo 125 Grain FMJ, 300rds $0.60/rd $179.85 In Stock 7d ago 9m ago Palmetto
RangeTime 300 Blackout Rangetime 150 grain 500 round case 781100777091 $0.60/rd $299.99 In Stock 77d ago 10m ago FlipAmmo
Ammo Inc Signature .300 Blackout 150Gr FMJ Ammunition – 500 rounds $0.60/rd $299.99 In Stock 12d ago 21m ago AR15Discounts
Stryker 300 AAC Blackout 147 gr FMJ - 50 ct. $0.61/rd $30.50 In Stock 34d ago 38m ago The American Marksman
Armscor Ammo 300 Blackout 147gr FMJ 1800 FPS Value Pack 100/box 4806015504467 Free S/H over $250 $0.61/rd $60.99 In Stock 2m ago 2m ago AE Armory
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs 812285021089 $0.62/rd $12.37 In Stock 2d ago 28m ago Locked Loaded
AMMO Inc 150gr 300 Blackout Bulk PackagingCase of 1200 FREE Shipping $0.62/rd $743.39 In Stock 55d ago 22m ago Wild Horse Ammo
US Cartridge 300 Blackout 147 Grain FMJ (200 Rounds) $0.62/rd $123.99 In Stock 74d ago 20m ago Ammunition Depot
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs 812285021089 $0.62/rd $12.41 In Stock 2d ago 6m ago Defense Depot
ARMSCOR AMMO 300AAC 147G FMJ 100/12 VALUE PACK 4806015504467 $0.62/rd $62.08 In Stock 7d ago 6m ago Defense Depot
RangeTime RangeTime 300 Blackout Rangetime 150 grain FMJ 250 Round Case 781100777091 $0.62/rd $156.25 In Stock 62d ago 10m ago FlipAmmo
RangeTime 300 Blackout Rangetime 150 grain FMJ 50 Round Box 781100777091 $0.63/rd $31.50 In Stock 77d ago 10m ago FlipAmmo
AMMO Inc 150gr 300 Blackout Bulk PackagingBattle Pack of 200 $0.63/rd $125.90 In Stock 49d ago 22m ago Wild Horse Ammo
300 AAC Blackout - 150 Grain FMJ - Ammo Inc. - 500 Rounds 0213202316167 $0.63/rd $315.00 65 6d ago 6m ago Lucky Gunner
AMMO INC AMO SIGNATURE SERIES 300 BLACKOUT 150GR FMJ 20RD ( 25 PER CASE ) 818778021826 $0.63/rd $12.61 In Stock 5d ago 22m ago Dack Outdoors
AMMO INC AMO SIGNATURE SERIES 300 BLACKOUT 150GR FMJ 20RD ( 25 PER CASE ) 818778021826 $0.63/rd $12.61 In Stock 3d ago 28m ago Locked Loaded
Armscor Precision Inc USA .300 AAC Blackout 147 Grain Full Metal Jacket Brass Cased Rifle Ammunition, 20 Rounds, FAC300AAC-1N-20RD 812285021089 $0.64/rd $12.69 In Stock 2d ago 1h ago Optics Planet
AMMO INC AMO SIGNATURE SERIES 300 BLACKOUT 150GR FMJ 20RD ( 25 PER CASE ) 818778021826 $0.64/rd $12.76 In Stock 4d ago 6m ago Defense Depot
Capital Cartridge .300 Blackout 200GR FMJ - SUBSONIC - REMAN - 200 Rounds With Free Ammo Can $0.64/rd $127.99 In Stock 14d ago 16m ago 2A Warehouse
Sellier & Bellot 300BLKA Rifle 300 Blackout 124 gr Full Metal Jacket 20 Bx/ 50 Cs 754908512447 $0.64/rd $12.88 In Stock 3d ago 28m ago Locked Loaded
Armscor USA 300 Blackout Ammo 147 grain FMJ Case of 200 Rounds FAC300AAC1N $0.64/rd $129.00 In Stock 5d ago 25m ago Gunprime
Sellier & Bellot 300BLKA Rifle 300 Blackout 124 gr Full Metal Jacket 20 Bx/ 50 Cs 754908512447 $0.65/rd $12.91 In Stock 7d ago 6m ago Defense Depot
Ammo Inc. Signature .300 Blackout 150 Grain FMJ 20 Round Box $0.65/rd $12.95 In Stock 34d ago 29m ago Shark Coast Tactical
Armscor USA .300 Blackout Ammunition 200 Rounds, FMJ, 147 Grain $0.65/rd $129.89 In Stock 13d ago 48m ago Cheaper Than Dirt
Armscor 300BO FMJ FAC300AAC1N 20 rounds 812285021089 $0.65/rd $12.99 In Stock 19d ago 24m ago BFG Outfitters
AMMO INCORPORATED 300B150FMJA20 818778021826 $0.65/rd $12.99 In Stock 60d ago 36m ago Charter Tactical
Armscor 300BO FMJ FAC300AAC1N 20 rounds 812285021089 $0.65/rd $12.99 In Stock 48d ago 36m ago Charter Tactical
AMMO INC AMO SIGNATURE SERIES 300 BLACKOUT 150GR FMJ 20RD ( 25 PER CASE ) 818778021826 $0.65/rd $12.99 In Stock 2d ago 23m ago GunZoneDeals
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 rounds 812285021089 $0.65/rd $12.99 In Stock 2d ago 23m ago GunZoneDeals
AMMO INCORPORATED 300B150FMJA20 818778021826 $0.65/rd $12.99 In Stock 14d ago 24m ago BFG Outfitters
Sellier & Bellot 300BLKA Rifle 300 Blackout 124 gr Full Metal Jacket 20 Bx/ 50 Cs 754908512447 $0.65/rd $13.02 In Stock 5d ago 22m ago Dack Outdoors
Armscor Precision Brass .300 AAC Blackout 147 Grain 100-Rounds FMJ 4806015504467 $0.66/rd $65.79 In Stock 2d ago 41s ago GrabAGun.com
Armscor 300blk 147gr Fmj 20/200 812285021089 $0.66/rd $13.17 In Stock 48d ago 1h ago Tactical Surplus USA
Ammo Inc 300blk 150gr Fmj 20/500 818778021826 $0.66/rd $13.20 In Stock 51d ago 1h ago Tactical Surplus USA
Ammo Inc .300 Blackout 150gr FMJ Ammo500-Round Case 818778021826 $0.66/rd $329.99 In Stock 19d ago 2h ago The Mag Shack
Ammo Inc. Ammo Inc, Signature, 300 Blackout, 150 Grain, Full Metal Jacket, 20 Round Box $0.66/rd $13.25 In Stock 1d ago 9m ago Dayco Ammo
Wolf Polyformance, .300 AAC Blackout, FMJ, 145 Grain, 500 Rounds $0.66/rd $332.49 In Stock 27d ago 7m ago Sportsman's Guide
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs 812285021089 $0.67/rd $13.32 In Stock 7d ago 35m ago Huligan Arms
Armscor USA .300 AAC BLACKOUT, 147gr, FMJ - 20 Rounds [MPN: FAC300AAC1N] 812285021096 $0.67/rd $13.32 In Stock 36d ago 4m ago Firearms Depot
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs 812285021089 $0.67/rd $13.33 In Stock 5d ago 6m ago Skogen’s Gun Supply
Armscor Ammo .300Aac Blackout 147gr. FMJ 20Rd Box 812285021089 $0.67/rd $13.34 In Stock 19d ago 46m ago Foundry Outdoors
ARMSCOR AMMO 300AAC 147G FMJ 100/12 VALUE PACK 4806015504467 $0.67/rd $66.67 In Stock 5d ago 6m ago Skogen’s Gun Supply
AMMO INC AMO SIGNATURE SERIES 300 BLACKOUT 150GR FMJ 20RD ( 25 PER CASE ) 818778021826 $0.67/rd $13.35 In Stock 7d ago 35m ago Huligan Arms
Wolf Polyformance, .300 AAC Blackout, FMJ, 145 Grain, 20 Rounds $0.67/rd $13.35 In Stock 8d ago 7m ago Sportsman's Guide
Sellier Bellot 300BLKA Rifle 300 AAC Blackout 124 GR Full Metal Jacket 20 Bx/ 50 Cs 754908512447 $0.67/rd $13.42 In Stock 6d ago 46m ago Foundry Outdoors

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.
Scroll to top