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 $0.54/rd $161.97 In Stock 3d ago 15m ago 2A Warehouse
Capital Cartridge .300 Blackout 147GR FMJ - REMAN - 200 Rounds With Free Ammo Can $0.55/rd $109.99 In Stock 17d ago 15m ago 2A Warehouse
300 AAC BLACKOUT 125 GR FMJ ZINC PLATED STEEL CASE 960 ROUNDS 689481697116 $0.59/rd $569.00 In Stock 39d ago 15m ago Tulammozone
STRYKER: 300 AAC BLACKOUT 147 GR FMJ - 400 CT $0.64/rd $256.00 In Stock 25d ago 12m ago The American Marksman
STRYKER: 300 AAC BLACKOUT 150 GR FMJ (Hornady) - 400 CT $0.64/rd $256.00 In Stock 25d ago 12m ago The American Marksman
Tula Ammo Premium Grade - .300 AAC Blackout 125 Grain FMJ - Zinc Plated Steel Case, Non-Corrosive, by Sergeant Major Munition - 500 Rounds - 300JBZNC $0.64/rd $319.99 In Stock 9d ago 2m ago Classic Firearms
AMMO INC 300 BLACKOUT 150 gr FMJ Full Metal Jacket Brass Ammunition 200rd Can $0.65/rd $129.99 In Stock 11d ago 12m ago BattleHawk Armory
Barnaul – 300 Blackout – 145 Grain – FMJ – Steel Polycoated Case – 500 Rounds $0.65/rd $325.99 In Stock 7d ago 5m ago True Shot Gun Club
STRYKER: 300 AAC BLACKOUT 147 GR FMJ - 50 CT $0.66/rd $33.00 In Stock 25d ago 12m ago The American Marksman
Barnaul – 300 Blackout – 145 Grain – FMJ – Steel Polycoated Case – 20 Rounds $0.68/rd $13.49 In Stock 7d ago 5m ago True Shot Gun Club
300 AAC BLACKOUT 125 GR BJB BRASS CASE 960 ROUNDS 689481697093 $0.68/rd $649.00 In Stock 39d ago 15m ago Tulammozone
Armscor Precision 300 Blackout 147 gr. FMJ 1200 rnd/case (Shipped from West Coast Warehouse) 4806015504467 $0.68/rd $810.99 In Stock 73d ago 15m ago Ammo Supply Warehouse
Fiocchi Range Dynamics 300 Blackout Ammo 150 grain FMJ BT Case of 500 Rounds Bulk 300BLKC $0.68/rd $339.00 In Stock 15d ago 33m ago Gunprime
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20rd BOX $0.70/rd $13.98 In Stock 17d ago 12m ago BattleHawk Armory
Armscor Precision 300 Blackout 147 gr. FMJ 100 rnd/VALUE PACK (Shipped from West Coast Warehouse) 4806015504467 $0.70/rd $69.99 In Stock 73d ago 15m ago Ammo Supply Warehouse
STRYKER: 300 AAC BLACKOUT M62 TRACER 142 GR FMJ - 400 CT $0.70/rd $280.00 In Stock 25d ago 12m ago The American Marksman
Fiocchi Shooting Dynamics Rifle Ammo Brass .300 AAC Blackout 50-Rounds 150 Grain FMJBT 762344711010 $0.70/rd $35.09 In Stock 29d ago 25m ago GrabAGun.com
Fiocchi 300blk 150gr Fmjbt 50/500 762344711010 $0.71/rd $35.70 In Stock 15d ago 29m ago Tactical Surplus USA
Fiocchi 300BLKC Training Dynamics 300 Blackout 150 gr Full Metal Jacket Boat Tail (FMJBT) 50 Bx/ 10 Cs $0.72/rd $35.99 In Stock 26d ago 6m ago Dack Outdoors
STRYKER: 300 AAC BLACKOUT M62 TRACER 142 GR FMJ - 50 CT $0.72/rd $36.00 In Stock 25d ago 12m ago The American Marksman
Wolf Polyformance 300 AAC Blackout 145 Grain FMJ Steel Case - 20 rds/box $0.73/rd $14.59 In Stock 3h ago 24m ago Mutiny Machine
Armscor 300 AAC Blackout Ammunition FAC300AAC100 147 Grain Full Metal Jacket Pack 500 Rounds - Free Shipping with Buyer's Club! $0.73/rd $364.99 In Stock 11d ago 9m ago Outdoor Limited
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs $0.74/rd $14.72 In Stock 3d ago 6m ago Locked Loaded
Wolf Polyformance Steel Ammo 300 AAC Blackout 145gr FMJ Rifle Ammunition - 20 RD BOX $0.74/rd $14.79 In Stock 17d ago 12m ago BattleHawk Armory
Fiocchi 300 Blackout Training Dynamics 150 gr Full Metal Jacket Boat Tail (FMJBT) 50 Box $0.74/rd $36.99 In Stock 17d ago 12m ago BattleHawk Armory
Fiocchi Shooting Dynamics Rifle 300BLKC 50 rounds 762344711010 $0.74/rd $36.99 In Stock 31d ago 19m ago DeeseFirearms.com
Armscor AUA 50446 100 rounds 4806015504467 $0.74/rd $73.98 In Stock 9d ago 2h ago Gman Sport
Fiocchi 300BLKC Shooting Dynamics 300 Blackout 150 gr Full Metal Jacket Boat Tail (FMJBT) 50 Bx/ 10 Cs $0.74/rd $37.25 In Stock 14d ago 6m ago Guns 2 Ammo
Ammunition 300 AAC Blackout 110 Grain Hornady V-MAX 20rd BOX $0.75/rd $14.94 In Stock 17d ago 12m ago BattleHawk Armory
300 AAC Blackout 150gr FMJ Corbon Performance Match Ammo Box (20 rds) $0.75/rd $14.99 In Stock 26d ago 8m ago The Armory
AMMO INC 300 BLACKOUT 150 gr FMJ Full Metal Jacket Brass Ammunition 20rd Box $0.75/rd $14.99 In Stock 17d ago 12m ago BattleHawk Armory
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx 812285021089 $0.75/rd $14.99 In Stock 4d ago 11m ago Firearms Depot
Armscor 300 AAC Blackout Ammunition FAC300AAC100 147 Grain Full Metal Jacket 100 Rounds - Free Shipping with Buyer's Club! 4806015504467 $0.75/rd $74.99 In Stock 11d ago 9m ago Outdoor Limited
300 AAC Blackout 147gr FMJ Sellier & Bellot Ammo Brick (200 rds) $0.75/rd $149.99 In Stock 10d ago 8m ago The Armory
Precision One 300 Blackout 150 Grain Full Metal Jacket PONE211 CASE 200 Rounds - Free Shipping with Buyer's Club! $0.75/rd $149.99 In Stock 4d ago 9m ago Outdoor Limited
Armscor 300 AAC Blackout Ammunition FAC300AAC100 147 Grain Full Metal Jacket Case of 1200 Rounds - Free Shipping with Buyer's Club! $0.75/rd $899.88 In Stock 11d ago 9m ago Outdoor Limited
WPA POLYFORMANCE 300 AAC BLACKOUT AMMO (Shipped from East Coast Warehouse) 20 rounds 645611308673 $0.76/rd $15.17 In Stock 26d ago 23m ago Ammo Supply Warehouse
WPA POLYFORMANCE 300 AAC BLACKOUT AMMO (Shipped from West Coast Warehouse) 20 rounds 645611308673 $0.76/rd $15.17 In Stock 26d ago 15m ago Ammo Supply Warehouse
Fiocchi Shooting Dynamics Rifle 300BLKC 50 rounds 762344711010 $0.76/rd $37.99 In Stock 31d ago 1h ago Bestow Training Group
Fiocchi Shooting Dynamics Rifle 300BLKC 50 rounds 762344711010 $0.76/rd $37.99 In Stock 18d ago 2h ago Gman Sport
Fiocchi Shooting Dynamics Rifle 300BLKC 50 rounds 762344711010 $0.76/rd $37.99 In Stock 31d ago 30m ago Tin Star Shooting Range
500 Round Case - 300 AAC Blackout 145 Grain FMJ Steel Case Wolf Ammo by Barnaul $0.76/rd $379.75 7 231d ago 49m ago SGAmmo
Wolf 300BLKFMJ1 Polyformance .300 Blackout 145 GR FMJ Steel Case, Non-Corrosive - 500 Round Case $0.76/rd $379.99 In Stock 9d ago 2m ago Classic Firearms
PPU PP300BF Standard Rifle 300 Blackout 125 gr Full Metal Jacket (FMJ) 20 Bx/ 50 Cs $0.77/rd $15.36 In Stock 48d ago 6m ago Locked Loaded
Fiocchi Shooting Dynamics Rifle 300BLKC 50 rounds 762344711010 $0.78/rd $38.99 In Stock 16d ago 13m ago Acute Firearms
Fiocchi 300BLKC Training Dynamics 300 Blackout 150 gr Full Metal Jacket Boat Tail (FMJBT) 50 Bx/ 10 Cs $0.78/rd $38.99 In Stock 48d ago 6m ago Locked Loaded
500 Round Can - 300 AAC Blackout 145 Grain FMJ Steel Case Wolf Ammo by Barnaul Packed in Used Military M2A1 or M2A2 Canister $0.78/rd $389.75 7 135d ago 49m ago SGAmmo
Prvi Partizan 300 Blackout 125gr FMJ Ammunition 20ct 8605003812425 $0.78/rd $15.61 In Stock 46d ago 4m ago Southern Defense
Precision One 300 Blackout Ammunition PONE1376 130 Grain Hollow Point 20 Rounds - Free Shipping with Buyer's Club! $0.78/rd $15.69 In Stock 27d ago 9m ago Outdoor Limited
Precision One 300 Blackout Ammunition PONE1449 150 Grain Copper Plated Full Metal Jacket 20 Rounds - Free Shipping with Buyer's Club! $0.78/rd $15.69 In Stock 26d ago 9m ago Outdoor Limited

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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