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
S&B 300BLK 147GR FMJ 20/1000 754908512454 $0.75/rd $14.99 In Stock 51d ago 2h ago HD Tactical
Winchester Repeating Arms USA300BLK 20 rounds 020892224568 $0.75/rd $14.99 In Stock 6d ago 33m ago BFG Outfitters
Winchester Repeating Arms USA300BLK 20 rounds 020892224568 $0.75/rd $14.99 In Stock 2d ago 13m ago Charter Tactical
Winchester Repeating Arms USA300BLK 20 rounds 020892224568 $0.75/rd $14.99 In Stock 2d ago 45m ago United Patriot Supply
Sellier & Bellot Rifle FMJ 300BLKA 20 rounds 754908512447 $0.75/rd $14.99 In Stock 44d ago 45m ago United Patriot Supply
Sellier & Bellot 300BLKB Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 50 Cs 754908512454 $0.75/rd $14.99 In Stock 14d ago 24m ago BattleHawk Armory
Sellier & Bellot Rifle FMJ 300BLKB 20 rounds 754908512454 $0.75/rd $14.99 In Stock 44d ago 45m ago United Patriot Supply
Armscor 300BO FMJ FAC300AAC1N 20 rounds 812285021089 $0.75/rd $14.99 In Stock 36d ago 3h ago Get Loaded PA
Armscor FAC300AAC1N USA 300 Blackout 147 gr, Full Metal Jacket (FMJ), 20 Per Box/10 Cs 812285021089 $0.75/rd $14.99 In Stock 20h ago 2h ago HD Tactical
AMMO INCORPORATED 300B150FMJA20 818778021826 $0.75/rd $14.99 In Stock 13d ago 38m ago Miami Police Depot
AMMO INCORPORATED 300B150FMJA20 818778021826 $0.75/rd $14.99 In Stock 13d ago 14m ago Griswald Defense
Ammo Inc .300 Blackout 150gr FMJ Ammo20-Round Box 818778021826 $0.75/rd $14.99 In Stock 10d ago 39m ago The Mag Shack
Precision One 300 Blackout 150 Grain Full Metal Jacket PONE211 CASE 200 Rounds $0.75/rd $149.99 In Stock 171d ago 22m ago Outdoor Limited
Stryker 300 AAC Blackout M62 Tracer 142 gr FMJ - 400 ct. $0.75/rd $300.00 In Stock 121d ago 5m ago The American Marksman
Fiocchi - Full Metal Jacket Boat Tail - 150 Grain 300 AAC Blackout Ammo - 500 Rounds 762344863580 $0.75/rd $374.99 In Stock 20d ago 56m ago CheapAmmo.com
Fiocchi 300 Blackout Ammo - 500 Rounds of 150 Grain FMJ Ammunition 762344863580 $0.75/rd $374.99 In Stock 6d ago 46m ago Ammo.com
WOLF AMO 300 BLACKOUT 145GR FMJ STEEL CASE 20RD ( 25 BOXES PER CASE ) 645611308673 $0.75/rd $15.08 In Stock 15d ago 42m ago Tombstone Tactical
Sellier & Bellot Ammunition 147 Grains .300 Blackout 20 Rounds FMJ 754908512454 $0.76/rd $15.09 In Stock 14d ago 7m ago GrabAGun.com
Wolf Polyformance .300 Blackout, 145gr FMJ, 20rd Box 645611308673 $0.76/rd $15.19 In Stock 16d ago 8m ago Impact Guns
Wolf Polyformance, .300 AAC Blackout, FMJ, 145 Grain, 20 Rounds $0.76/rd $15.19 In Stock 43d ago 45m ago Sportsman's Guide
Fiocchi Shooting Dynamics Rifle 300BLKC 50 rounds 762344711010 $0.76/rd $37.99 In Stock 38d ago 1h ago Hot Ammo
Winchester Ammo USA300BLK USA 300 Blackout 125 gr 2185 fps Open Tip Range 100 Rounds 020892224568 $0.76/rd $75.99 In Stock 2d ago 2h ago BH Ammo
Winchester Ammo USA300BLK USA 300 Blackout 125 gr 2185 fps Open Tip Range 200 Rounds 020892224568 $0.76/rd $151.99 In Stock 2d ago 2h ago BH Ammo
500 Round Case - 300 AAC Blackout 145 Grain FMJ Steel Case Wolf Ammo by Barnaul $0.76/rd $379.75 13 168d ago 56m ago SGAmmo
Wolf Polyformance, .300 AAC Blackout, FMJ, 145 Grain, 500 Rounds $0.76/rd $379.99 In Stock 23h ago 45m ago Sportsman's Guide
Winchester Ammo USA300BLK USA 300 Blackout 125 gr 2185 fps Open Tip Range 500 Rounds 020892224568 $0.76/rd $379.99 In Stock 2d ago 2h ago BH Ammo
300 AAC Blackout 20 Rounds Ammunition Sellier & Bellot 124 Grain Full Metal Jacket $0.76/rd $15.21 In Stock 29m ago 116d ago Wholesale Hunter
300 AAC Blackout 20 Rounds Ammunition Sellier & Bellot 124 Grain Full Metal Jacket $0.76/rd $15.21 In Stock 29m ago 116d ago Wholesale Hunter
Fiocchi 300BLKC Shooting Dynamics 300 Blackout 150 gr Full Metal Jacket Boat Tail (FMJBT) 50 Bx/ 10 Cs 762344711010 $0.76/rd $38.08 In Stock 29d ago 30m ago Guns 2 Ammo
Winchester Ammo USA300BLK USA 300 Blackout 125 gr Open Tip Range 20 Bx/ 10 Cs 020892224568 $0.76/rd $15.25 In Stock 2h ago 19m ago Beebe Family Arms & Munitions
300 AAC Blackout 20 Rounds Ammunition Armscor Precision Inc 147 Grain Full Metal Jacket $0.76/rd $15.28 In Stock 29m ago 116d ago Wholesale Hunter
Ammo Inc 300B150FMJA20 Signature 300 Blackout 150 GRFull Metal Jacket (FMJ) 20 Per Box/25 Cs - 20rd Box $0.76/rd $15.29 In Stock 2d ago 23m ago Classic Firearms
AMMO INC AMO SIGNATURE SERIES 300 BLACKOUT 150GR FMJ 20RD ( 25 PER CASE ) 818778021826 $0.76/rd $15.29 In Stock 13d ago 30m ago The Armories
Sellier & Bellot 300 Blackout 147 Grain Full Metal Jacket - 1000 Rounds - Free Shipping! 754908512454 $0.76/rd $765.00 In Stock 70d ago 34m ago Bereli
300 AAC Blackout 20 Rounds Ammunition Wolf Performance Ammo 145 Grain FMJ $0.77/rd $15.34 In Stock 29m ago 116d ago Wholesale Hunter
Winchester USA White Box Brass .300 AAC Blackout 125-Grain 20-Rounds OTR 020892224568 $0.77/rd $15.39 In Stock 2d ago 7m ago GrabAGun.com
Fiocchi 300BLKC Training Dynamics 300 Blackout 150 gr Full Metal Jacket Boat Tail (FMJBT) 50 Bx/ 10 Cs 762344711010 $0.77/rd $38.52 In Stock 15d ago 29m ago Acute Firearms
Winchester .300 AAC BLACKOUT, 125gr, OT - 20 Rounds [MPN: USA300BLK] 020892224568 $0.77/rd $15.41 In Stock 2d ago 19m ago Firearms Depot
Winchester Ammo USA300BLK USA 300 Blackout 125 gr Open Tip Range 20 Bx/ 10 Cs 020892224568 $0.77/rd $15.42 In Stock 2d ago 43m ago Skogen’s Gun Supply
Sellier & Bellot 300BLK 124 Grain FMJ 20Rd Box SB300BLKA $0.77/rd $15.46 In Stock 12h ago 40m ago Gun Buyer
Winchester Ammo USA300BLK USA 300 Blackout 125 gr Open Tip Range 20 Bx/ 10 Cs 020892224568 $0.77/rd $15.46 In Stock 3h ago 24m ago BattleHawk Armory
SELLIER BELLOT 300 AAC Blackout 124gr FMJ Brass Rifle Ammunition | 20 Rounds 754908512447 $0.77/rd $15.47 In Stock 1d ago 1h ago KyGunCo
Ammunition 300 AAC Blackout 110 Grain Hornady V-MAX 20rd BOX 818778022656 $0.77/rd $15.48 In Stock 14d ago 24m ago BattleHawk Armory
Sellier & Bellot Tactical 300 AAC Blackout 124gr FMJ Ammo 2165 FPS SuperSonic 20/box 754908512447 Free S/H over $250 $0.78/rd $15.49 In Stock 79d ago 2h ago AE Armory
Winchester USA Target 300 AAC Blackout Ammo 125 Grain Open Tip Box of 20 - brass case 020892224568 $0.78/rd $15.50 In Stock 6d ago 2m ago Target Sports USA
Winchester USA Target 300 AAC Blackout Ammo 125 Grain Open Tip Case of 200 (10 Boxes of 20) - FREE SHIPPING - brass case 020892224568 $0.78/rd $155.00 In Stock 6d ago 2m ago Target Sports USA
Winchester USA Ready 300 AAC Blackout Ammo 125 Grain Full Metal Jacket Open Tip - 1000 Rounds - Free Shipping! 020892226562 $0.78/rd $775.00 In Stock 28d ago 34m ago Bereli
Fiocchi 300 AAC Blackout 150 GR FMJ Boat Tail 50/Box $0.78/rd $38.78 In Stock 5h ago 29m ago Sportsmans Outdoors Superstore
Fiocchi Range Dynamics Brass .300 AAC Blackout 150 Grain 50-Rounds FMJBT 762344711010 $0.78/rd $38.79 In Stock 8d ago 7m ago GrabAGun.com
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs 812285021089 $0.78/rd $15.54 In Stock 5d ago 22m ago SHTF Tactical

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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