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 $0.47/rd $140.99 In Stock 38d ago 21m ago 2A Warehouse
Wolf 300 AAC Blackout - 145gr FMJ - Non-corrosive - 20 rounds - FAST SHIPPING!! - COVERED BY OUR NO BS MONEY BACK GUARANTEE 645611308673 $0.48/rd $9.60 In Stock 31d ago 23m ago AmmoGuy.net
.300 AAC Blackout 500 rounds $0.48/rd $240.00 In Stock 4d ago 1h ago 1st Round Ammo
ARMSCOR AMMO 300AAC 147G FMJ 100/12 VALUE PACK $0.51/rd $51.02 In Stock 4d ago 1h ago Gman Sport
.300 AAC Blackout 1000 rounds $0.51/rd $510.00 In Stock 4d ago 1h ago 1st Round Ammo
AMMO, INC. .300 BLACKOUT 150 GR Full Metal Jacket 500ct 818778021826 $0.51/rd $256.88 In Stock 59d ago 48m ago Southern Defense
Capital Cartridge .300 Blackout 147GR FMJ - NEW BRASS - 250 Rounds With Free Ammo Can $0.52/rd $129.99 In Stock 38d ago 21m ago 2A Warehouse
AAC 300 Blackout Ammo 150 Grain FMJ 20rd Box w/ JAG Head Stamp $0.55/rd $10.99 In Stock 9h ago 34m ago Palmetto State Armory
AMMO INC .300 BLACKOUT AMMO 150GR FMJ 500 rounds 818778021826 $0.56/rd $280.00 In Stock 8d ago 12m ago Sentry Ammo
AMMO INC AMO SIGNATURE SERIES 300 BLACKOUT 150GR FMJ 20RD ( 25 PER CASE ) $0.56/rd $11.22 In Stock 10d ago 1h ago Gman Sport
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs $0.57/rd $11.47 In Stock 8d ago 4m ago Locked Loaded
Armscor USA .300 Blackout Ammunition Full Metal Jacket 147 Grains 100 rounds 4806015504467 $0.58/rd $57.90 In Stock 7d ago 48m ago Southern Defense
Armscor .300 AAC Blackout 147gr FMJ Rifle Ammunition 100 rounds 4806015504467 $0.58/rd $57.90 In Stock 8d ago 12m ago Sentry Ammo
Armscor USA .300 Blackout Ammunition Full Metal Jacket 147 Grains 500 rounds 4806015504467 $0.58/rd $289.50 In Stock 7d ago 48m ago Southern Defense
Armscor USA .300 Blackout Ammunition Full Metal Jacket 147 Grains 1000 rounds 4806015504467 $0.58/rd $579.00 In Stock 7d ago 48m ago Southern Defense
RangeTime 300 Blackout Rangetime 150 grain FMJ 50 Round Box- $15 Flat Shipping unlimited boxes! 781100777091 $0.58/rd $29.00 In Stock 7d ago 1h ago FlipAmmo
Stryker 300 AAC Blackout 147 gr FMJ - 400 ct. $0.58/rd $232.00 In Stock 37d ago 30m ago The American Marksman
Armscor .300 AAC Blackout 147gr FMJ Rifle Ammunition 500 rounds 4806015504467 $0.58/rd $289.75 In Stock 8d ago 12m ago Sentry Ammo
Armscor .300 AAC Blackout 147gr FMJ Rifle Ammunition 1000 rounds 4806015504467 $0.58/rd $579.50 In Stock 8d ago 12m ago Sentry Ammo
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs $0.59/rd $11.83 In Stock 5d ago 1h ago Gman Sport
120 ROUNDS 300 AAC BLACKOUT 125 GR FMJ ZINC PLATED STEEL 120 rounds 689481697116 $0.60/rd $71.55 In Stock 5h ago 30s ago Tulammozone
Still American 300 Blackout 147 Grain FMJ-BT - 100 rds/box $0.60/rd $59.89 In Stock 21d ago 12m ago Mutiny Machine
AAC 300 Blackout Ammo 110 Grain V-Max 20rd Box Ammunition $0.60/rd $11.99 In Stock 13d ago 13d ago Palmetto
AAC 300 Blackout Ammo 125 Grain FMJ 20rd Box $0.60/rd $11.99 In Stock 13d ago 13d ago Palmetto
Ammo Inc .300 Blackout Ammo 150gr FMJ, 20rds - 300B150FMJ-A20 $0.60/rd $11.99 In Stock 10d ago 34m ago Palmetto State Armory
15 Boxes of AAC 300 Blackout Ammo 125 Grain FMJ, 300rds $0.60/rd $179.85 In Stock 13d ago 13d ago Palmetto
AAC 300 Blackout Ammo 110 Grain V-Max 300rd Bundle $0.60/rd $179.85 In Stock 12h ago 2m ago Palmetto
RangeTime 300 Blackout Rangetime 150 grain 500 round case $0.60/rd $299.99 In Stock 50d ago 1h ago FlipAmmo
Armscor Precision Brass .300 AAC Blackout 147 Grain 100-Rounds FMJ 4806015504467 $0.60/rd $60.29 In Stock 8d ago 9m ago GrabAGun.com
AMMO INC AMO SIGNATURE SERIES 300 BLACKOUT 150GR FMJ 20RD ( 25 PER CASE ) $0.61/rd $12.16 In Stock 23d ago 4m ago Locked Loaded
ARMSCOR AMMO 300AAC 147G FMJ 100/12 VALUE PACK $0.61/rd $60.99 In Stock 8h ago 4m ago Gulf Coast Gun & Outdoors
ARMSCOR AMMO 300AAC 147G FMJ 100/12 VALUE PACK $0.61/rd $61.44 In Stock 8d ago 49m ago Youngblood Tactical
Ammo Inc 300 Blackout 150gr FMJ 1850 FPS 20/box 500 Round Case - FREE SHIPPING 818778021826 Free S/H over $250 $0.62/rd $308.99 In Stock 51d ago 44m ago AE Armory
Armscor Rifle 300 Blackout 147 gr Full... 20 rounds $0.62/rd $12.39 In Stock 8d ago 49m ago Youngblood Tactical
500 Round Case - 300 Blackout 150 Grain FMJ Ammo Incorporated Ammo - 300B150FMJ-A20 $0.62/rd $309.75 7 55d ago 33m ago SGAmmo
Armscor 300blk 147gr Fmj 20/200 812285021089 $0.62/rd $12.46 In Stock 7d ago 1h ago Tactical Surplus USA
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs $0.62/rd $12.46 In Stock 7d ago 14m ago Huligan Arms
Ammo Inc 300 Blackout 150gr FMJ 1850 FPS 20/box 818778021826 Free S/H over $250 $0.62/rd $12.48 In Stock 51d ago 44m ago AE Armory
ARMSCOR AMMO 300AAC 147G FMJ 100/12 VALUE PACK $0.63/rd $62.95 In Stock 10d ago 14m ago Huligan Arms
Ammo Inc 300 AAC Blackout - 150gr - FMJ - 20 rounds - COVERED BY OUR NO BS MONEY BACK GUARANTEE $0.63/rd $12.65 In Stock 82d ago 23m ago AmmoGuy.net
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs $0.64/rd $12.71 In Stock 1d ago 12m ago Guns 2 Ammo
Ammo Inc .300 AAC Blackout Ammunition 150gr Full Metal Jacket FMJ (20 Rounds) 818778021826 $0.64/rd $12.78 In Stock 45d ago 9m ago Caliber Armory
Armscor USA .300 Blackout 147 Grain 20-Rounds FMJ 812285021089 $0.64/rd $12.79 In Stock 8d ago 9m ago GrabAGun.com
.300 Blackout 150GR FMJ Ammo Inc. (100 rounds) $0.64/rd $63.99 In Stock 165d ago 16m ago Canoe Club USA
Armscor 300 Blackout Armscor 147 Grain FMJ-200 ROUNDS 812285021089 $0.64/rd $128.00 In Stock 58d ago 1h ago FlipAmmo
Stryker 300 AAC BLACKOUT 150 gr FMJ (Hornady) - 400 ct. $0.64/rd $256.00 In Stock 27d ago 30m ago The American Marksman
Ammo Inc 300 Blackout Ammunition AI300B150FMJ-A20 150 Grain Full Metal Jacket CASE 500 Rounds $0.64/rd $319.99 In Stock 16d ago 23m ago Outdoor Limited
AMMO INC AMO SIGNATURE SERIES 300 BLACKOUT 150GR FMJ 20RD ( 25 PER CASE ) $0.64/rd $12.87 In Stock 22d ago 21m ago Dack Outdoors
20 Round Box - 300 Blackout 150 Grain FMJ Ammo Incorporated Ammo - 300B150FMJ-A20 $0.65/rd $12.95 114 55d ago 33m ago SGAmmo
Ammo Inc 300blk 150gr Fmj 20/500 818778021826 $0.65/rd $12.97 In Stock 37d ago 1h ago Tactical Surplus USA

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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