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 1d ago 4m ago 2A Warehouse
.300 AAC Blackout 1000 rounds $0.53/rd $530.00 In Stock 7d ago 58m ago 1st Round Ammo
.300 AAC Blackout 500 rounds $0.55/rd $275.00 In Stock 7d ago 58m ago 1st Round Ammo
120 ROUNDS 300 AAC BLACKOUT 125 GR FMJ ZINC PLATED STEEL 120 rounds 689481697116 $0.56/rd $66.99 In Stock 62d ago 25m ago Tulammozone
Barnaul 300 BLK Poly Coated Steel Case 145gr FMJ – 20 RDS $0.56/rd $11.29 In Stock 13d ago 1h ago AB Guns
AAC 300 Blackout Ammo 125 Grain FMJ 20rd Box $0.60/rd $11.99 In Stock 19d ago 10d ago Palmetto
Barnaul – 300 Blackout – 145 Grain – FMJ – Steel Polycoated Case – 500 Rounds $0.60/rd $299.99 In Stock 38d ago 15m ago True Shot Gun Club
AMMO INC AMO SIGNATURE SERIES 300 BLACKOUT 150GR FMJ 20RD ( 25 PER CASE ) $0.61/rd $12.16 In Stock 5d ago 29m ago Locked Loaded
Capital Cartridge .300 Blackout 150GR Soft Point- REMAN - 50 Rounds $0.61/rd $30.50 In Stock 1d ago 4m ago 2A Warehouse
.300 Blackout 150GR FMJ Ammo Inc. (100 rounds) $0.64/rd $63.99 In Stock 35d ago 23m ago Canoe Club USA
STRYKER: 300 AAC BLACKOUT 147 GR FMJ - 400 CT $0.64/rd $256.00 In Stock 89d ago 12m ago The American Marksman
AMMO INC AMO SIGNATURE SERIES 300 BLACKOUT 150GR FMJ 20RD ( 25 PER CASE ) $0.65/rd $12.99 In Stock 5d ago 14m ago Dack Outdoors
AAC 300 Blackout Ammo 110 Grain V-Max 20rd Box Ammunition $0.65/rd $12.99 In Stock 18d ago 10d ago Palmetto
Ammo Inc .300 Blackout Ammo 150gr FMJ, 20rds - 300B150FMJ-A20 $0.65/rd $12.99 In Stock 6d ago 27m ago Palmetto State Armory
Ammo Inc Signature 300 AAC Blackout | 150gr FMJ | 20rds $0.65/rd $12.99 In Stock 5d ago 2h ago 2NY Tactical & Ammo
Capital Cartridge .300 Blackout 200GR FMJ - SUBSONIC - REMAN - 200 Rounds With Free Ammo Can $0.65/rd $129.99 In Stock 1d ago 4m ago 2A Warehouse
Ammo Inc Range Pack .300 Blackout Ammo 150gr FMJ, 200rds - 300B150FMJ-A200 $0.65/rd $129.99 In Stock 13d ago 27m ago Palmetto State Armory
AAC 300 Blackout Ammo 110 Grain V-Max 300rd Bundle $0.65/rd $194.85 In Stock 18d ago 10d ago Palmetto
Ammo Inc 300 Blackout Ammunition AI300B150FMJ-A20 150 Grain Full Metal Jacket CASE 500 Rounds $0.66/rd $329.99 In Stock 1d ago 42m ago Outdoor Limited
AMMO INC AMO SIGNATURE SERIES 300 BLACKOUT 150GR FMJ 20RD ( 25 PER CASE ) $0.66/rd $13.21 In Stock 5d ago 17m ago Gman Sport
Ammo Inc 300 Blackout 150gr FMJ 1850 FPS 20/box 818778021826 Free S/H over $250 $0.68/rd $13.49 In Stock 9d ago 1h ago AE Armory
Barnaul – 300 Blackout – 145 Grain – FMJ – Steel Polycoated Case – 20 Rounds $0.68/rd $13.49 In Stock 38d ago 15m ago True Shot Gun Club
300 Blackout 147 Grain FMJ-BT - 100 rds/box $0.68/rd $67.49 In Stock 23d ago 51m ago Mutiny Machine
Precision One 300 Blackout Ammunition PONE1449 150 Grain Copper Plated Full Metal Jacket CASE 200 Rounds $0.68/rd $134.99 In Stock 1d ago 42m ago Outdoor Limited
Fiocchi Range Dynamics 300 Blackout Ammo 150 grain FMJ BT Case of 500 Rounds Bulk 300BLKC $0.68/rd $339.00 In Stock 79d ago 23m ago Gunprime
Armscor USA .300 Blackout 147 Grain 20-Rounds FMJ 812285021089 $0.68/rd $13.59 In Stock 4d ago 24m ago GrabAGun.com
AMMO INC .300 AAC BLACKOUT AMMO 150GR FMJ, 20RDS - 300B150FMJ-A20 818778021826 $0.68/rd $13.59 In Stock 1d ago 23m ago Firearms Depot
Ammo Inc 300 Blackout Ammo 168gr BTHP 20rds $0.70/rd $13.99 In Stock 19d ago 27m ago Palmetto State Armory
Ammo Inc 300 Blackout Ammunition AI300B150FMJ-A20 150 Grain Full Metal Jacket 20 Rounds 818778021826 $0.70/rd $13.99 In Stock 1d ago 42m ago Outdoor Limited
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) - 20rds - VETERAN OWNED BUSINESS 812285021089 $0.70/rd $13.99 In Stock 18d ago 31m ago Madison Guns
Precision One 300 Blackout Ammunition PONE1449 150 Grain Copper Plated Full Metal Jacket 20 Rounds $0.70/rd $13.99 In Stock 1d ago 42m ago Outdoor Limited
Armscor USA 300 Blackout Ammo 147 grain FMJ Box of 100 Rounds 50446 $0.70/rd $69.95 In Stock 17d ago 23m ago Gunprime
Armscor 300 AAC Blackout Ammunition FAC300AAC100 147 Grain Full Metal Jacket Pack 500 Rounds $0.70/rd $349.99 In Stock 1d ago 42m ago Outdoor Limited
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20rd BOX $0.71/rd $14.28 In Stock 2d ago 18m ago BattleHawk Armory
Wolf Polyformance Steel Ammo 300 AAC Blackout 145gr FMJ Rifle Ammunition - 20 RD BOX $0.72/rd $14.34 In Stock 26d ago 18m ago BattleHawk Armory
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs $0.72/rd $14.47 In Stock 2d ago 29m ago Locked Loaded
Wolf Polyformance 300 Blackout Ammo 145 Grain FMJ Steel Case Box of 20 - steel case 645611308673 $0.72/rd $14.50 In Stock 4d ago 23m ago Target Sports USA
Wolf Polyformance 300 Blackout Ammo 145 Grain FMJ Steel Case Case of 500 (25 Boxes of 20) - Free Shipping - steel case 645611308673 $0.72/rd $362.50 In Stock 4d ago 23m ago Target Sports USA
Wolf Polyformance 300 AAC Blackout 145 Grain FMJ Steel Case - 20 rds/box $0.73/rd $14.59 In Stock 64d ago 51m ago Mutiny Machine
Fiocchi 300 Blackout Training Dynamics 150 gr Full Metal Jacket Boat Tail (FMJBT) 50 Box $0.74/rd $36.99 In Stock 15d ago 18m ago BattleHawk Armory
Fiocchi Shooting Dynamics Rifle Ammo Brass .300 AAC Blackout 50-Rounds 150 Grain FMJBT 762344711010 $0.74/rd $36.99 In Stock 13d ago 24m ago GrabAGun.com
ARMSCOR AMMO 300AAC 147G FMJ 100/12 VALUE PACK $0.74/rd $74.51 In Stock 22h ago 17m ago Gman Sport
AMMO INC 300 BLK 155gr BTHP BRASS AMMUNITION - 200rd AMMO CAN $0.75/rd $149.13 In Stock 16d ago 18m ago BattleHawk Armory
Ammunition 300 AAC Blackout 110 Grain Hornady V-MAX 20rd BOX $0.75/rd $14.94 In Stock 81d ago 18m ago BattleHawk Armory
Armscor Ammo .300Aac Blackout 147gr. FMJ 20Rd Box 812285021089 $0.75/rd $14.96 In Stock 10d ago 28m ago Foundry Outdoors
300 AAC Blackout - 150 gr FMJ - Federal American Eagle (AE300BLK1) - 500 Rounds $0.75/rd $374.00 In Stock 11d ago 5m ago Bulk Munitions
BARNES 300 AAC BLACKOUT 120GR JHP FB - 20 RDS $0.75/rd $14.97 In Stock 4d ago 1h ago AB Guns
HSM 300BLK14N 300 BO 150 SPBT 20/25 $0.75/rd $14.97 In Stock 14d ago 17m ago Gman Sport
AMMOINC 300B168BTHP-A20 300B 168 BTHP 20/10 $0.75/rd $14.97 In Stock 14d ago 17m ago Gman Sport
AMMOINC 300B168BTHP-A20 300B 168 BTHP 20/10 $0.75/rd $14.99 In Stock 48d ago 14m ago Dack 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.
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