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
Winchester Repeating Arms Deer Season XP Extreme Point X300BLKDS 20 rounds 020892222670 $1.80/rd $35.99 In Stock 692d ago 25m ago FireLine Armory
Federal FDR 300BLK 150GR SP PWR-SHK 20 rounds 604544650488 $1.35/rd $26.99 In Stock 680d ago 25m ago FireLine Armory
Sig Sauer Match Grade OTM E300A1-20 798681514489 $1.45/rd $28.99 In Stock 672d ago 25m ago FireLine Armory
Gorilla Ammunition .300 AAC BlackOut 110gr Nosler Varmageddon – 20 Round Box $1.65/rd $32.99 In Stock 661d ago 11m ago Gorilla Ammunition
Gorilla Ammunition .300 AAC BlackOut, 147gr FMJ – 20 Round Box $1.65/rd $32.99 In Stock 661d ago 11m ago Gorilla Ammunition
Gorilla Ammunition .300 AAC BlackOut 125gr Sierra MatchKing – 20 Round Box $1.65/rd $32.99 In Stock 661d ago 11m ago Gorilla Ammunition
Sig Sauer SIG E300B120 798681619634 $1.00/rd $19.98 In Stock 636d ago 25m ago FireLine Armory
Hornady Black V-Max 80873 20 rounds 090255808735 $1.30/rd $25.99 In Stock 632d ago 25m ago FireLine Armory
PPU Standard Rifle FMJ PP300BF 20 rounds 8605003812425 $0.95/rd $18.98 In Stock 617d ago 25m ago FireLine Armory
Winchester Repeating Arms WIN AMMO USA .300 AAC BLACKOUT 147GR. FMJ 20-PK 020892231030 $1.10/rd $21.99 In Stock 603d ago 25m ago FireLine Armory
Sierra A462510 20 rounds 612710135424 $1.50/rd $29.99 In Stock 601d ago 25m ago FireLine Armory
Barnes Bullets VOR-TX Rifle 30827 20 rounds 716876301201 $1.90/rd $37.99 In Stock 601d ago 25m ago FireLine Armory
Sig Sauer Elite Hunting OTM E300H1-20 798681552979 $1.65/rd $32.99 In Stock 601d ago 25m ago FireLine Armory
Remington Ammunition 26855 50 rounds 047700486505 $1.28/rd $63.99 In Stock 598d ago 25m ago FireLine Armory
Winchester Repeating Arms USA300BLK 20 rounds 020892224568 $1.10/rd $21.99 In Stock 596d ago 25m ago FireLine Armory
HSM Subsonic HPBT 300BLK4N 20 rounds 837306006784 $1.55/rd $30.99 In Stock 563d ago 25m ago FireLine Armory
Fiocchi Extrema Rifle 300BLKHA 25 rounds 762344711188 $1.08/rd $26.99 In Stock 562d ago 25m ago FireLine Armory
Federal American Eagle FMJBT AE300BLK1 20 rounds 604544617009 $1.10/rd $21.99 In Stock 545d ago 25m ago FireLine Armory
Federal American Eagle Full Metal Jacket (FMJ) 150 Grain 300 AAC Blackout Ammo - 20 Rounds 604544617009 $1.29/rd $25.75 In Stock 541d ago 2h ago CheapAmmo.com
Gorilla 300 AAC BlackOut Subsonic 220gr Sierra MatchKing – 20 Round Box $1.85/rd $36.99 In Stock 370d ago 11m ago Gorilla Ammunition
Sierra A462510 20 rounds 612710135424 $1.40/rd $27.99 In Stock 308d ago 54m ago Elite FIrearms Online
HSM Subsonic HPBT 300BLK4N 20 rounds 837306006784 $1.60/rd $31.99 In Stock 308d ago 54m ago Elite FIrearms Online
Gorilla Silverback, 300 BLK 205gr, Self Defense & Hunting Subsonic Ammunition – 20 Round Box $2.45/rd $48.99 In Stock 286d ago 11m ago Gorilla Ammunition
HSM Game King Spitzer 300BLK3N 20 rounds 837306007200 $1.35/rd $26.99 In Stock 272d ago 30m ago Sahuarita Guns
HSM Subsonic HPBT 300BLK4N 20 rounds 837306006784 $1.65/rd $32.99 In Stock 262d ago 17m ago Sergeant's Arms
Fiocchi Extrema 300 Blackout 125 gr. SST 300BLKHA 25 rnd/box 762344711188 $1.00/rd $24.99 In Stock 238d ago 57m ago Ammo Supply Warehouse
Fiocchi 300 Blackout 150 gr. FMJ 300BLKC 50 rnd/box 762344711010 $0.90/rd $44.99 In Stock 238d ago 57m ago Ammo Supply Warehouse
DEFIANT Munitions 300 BLK 125 gr. DDM MATCH JHP 20 rnd/box 730167404389 $2.00/rd $39.99 In Stock 238d ago 57m ago Ammo Supply Warehouse
Sig Sauer Elite Performance 300 Blackout 125gr OTM 2200 FPS 20/box 798681514489 Free S/H over $250 $1.25/rd $24.99 In Stock 232d ago 31m ago AE Armory
Hornady Black A-Max 80891 20 rounds 090255808919 $1.45/rd $28.99 In Stock 218d ago 17m ago Sergeant's Arms
Sig Sauer Elite Hunting OTM E300H1-20 798681552979 $1.50/rd $29.99 In Stock 217d ago 1h ago Get Loaded PA
HSM Subsonic HPBT 300BLK4N 20 rounds 837306006784 $1.55/rd $30.99 In Stock 217d ago 1h ago Get Loaded PA
HSM Game King Spitzer 300BLK3N 20 rounds 837306007200 $1.30/rd $25.99 In Stock 217d ago 1h ago Get Loaded PA
Sig Elite Hunting OTM E300H1-20 798681552979 $1.60/rd $31.99 In Stock 212d ago 17m ago Sergeant's Arms
Fiocchi 300 Blackout 150 gr. FMJ 300BLKC 500 rnd/case $0.87/rd $436.99 In Stock 210d ago 57m ago Ammo Supply Warehouse
HSM Game King Spitzer 300BLK3N 20 rounds 837306007200 $1.35/rd $26.99 In Stock 195d ago 17m ago Sergeant's Arms
Sellier & Bellot .300 Blackout Ammunition 1000 Rounds FMJ 124 Grains SB300BLKA 754908517442 $0.80/rd $799.89 In Stock 185d ago 38m ago Cheaper Than Dirt
Colt Defense .300 Blackot Ammunition 20 Rounds Match HPBT 220 Grains 091037349262 $2.00/rd $39.89 In Stock 185d ago 38m ago Cheaper Than Dirt
DoubleTap .300 AAC Blackout 125 Grain TMK 20 Rounds 091037683588 $1.50/rd $29.89 In Stock 185d ago 38m ago Cheaper Than Dirt
300 AAC Blackout - 125 Grain OT - Winchester USA Ready - 20 Rounds 020892226562 $1.20/rd $24.00 142 180d ago 31m ago Lucky Gunner
300 AAC Blackout - 150 Grain JSP - Federal Power-Shok - 20 Rounds 604544650488 $1.30/rd $26.00 129 180d ago 31m ago Lucky Gunner
300 AAC Blackout - 150 Grain FMJ - Ammo Inc. - 20 Rounds 818778021826 $0.90/rd $18.00 137 180d ago 31m ago Lucky Gunner
300 AAC Blackout - 147 Grain FMJ - Doubletap Match - 20 Rounds 91037349101 $0.95/rd $19.00 66 180d ago 31m ago Lucky Gunner
300 AAC Blackout - 150 Grain FMJ - Corbon Performance Match - 20 Rounds 851383008073 $0.88/rd $17.50 43 180d ago 31m ago Lucky Gunner
300 AAC Blackout - 120 Grain JHP FB - Barnes - 20 Rounds 716876120307 $1.20/rd $24.00 46 180d ago 31m ago Lucky Gunner
300 AAC Blackout - 125 Grain FMJ - Hornady Frontier - 20 Rounds 090255713978 $1.20/rd $24.00 123 180d ago 31m ago Lucky Gunner
300 AAC Blackout - 110 Grain eXergy Blue - Sellier & Bellot - 20 Rounds 8590690341849 $1.50/rd $30.00 125 180d ago 31m ago Lucky Gunner
300 AAC Blackout - 150 Grain CTFB - Remington UMC - 200 Rounds 047700410319 $1.22/rd $245.00 8 180d ago 31m ago Lucky Gunner
300 AAC Blackout - 150 Grain FMJ - Federal American Eagle - 20 Rounds 604544617009 $1.20/rd $24.00 134 180d ago 31m ago Lucky Gunner
300 AAC Blackout - 208 Grain A-MAX - HSM Match - 20 Rounds 837306006777 $1.40/rd $28.00 1 180d ago 31m ago Lucky Gunner

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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