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
300 AAC Blackout 20 Rounds Ammunition Barnes 120 Grain Ballistic Tip $1.97/rd $39.39 In Stock 7m ago 117d ago Wholesale Hunter
300 AAC Blackout 20 Rounds Ammunition Barnes 110 Grain Ballistic Tip $1.97/rd $39.39 In Stock 7m ago 117d ago Wholesale Hunter
Barnes Bullets 30827 VOR-TX Rifle 300 Blackout 120 gr TAC-TX Boat Tail 20 Bx/ 10 Cs $1.96/rd $39.29 In Stock 5h ago 51m ago DEGUNS.NET
Barnes VOR-TX .300 AAC Blackout 120gr, Tipped Triple Shock X-Bullet Boattail, 20rd Box 716876301201 $1.96/rd $39.29 In Stock 21d ago 13m ago Impact Guns
Liberty Ammunition Animal Instinct 300 AAC Blackout/Whisper (7.62x35mm) 96gr 20rd Box 019962272134 $1.96/rd $39.29 In Stock 94d ago 13m ago Impact Guns
Barnes Bullets 21548 VOR-TX Rifle 300 Blackout 110 gr TAC-TX Flat Base 20 Bx/ 10 Cs $1.96/rd $39.29 In Stock 5h ago 51m ago DEGUNS.NET
SIG SAUER Elite Performance .300 Blk OTM 125 Grain - 20 Rounds - Free Shipping! $1.96/rd $39.27 In Stock 109d ago 1h ago Bereli
Winchester Ammo X300BLKX Super-X 300 Blackout 200 gr Power-Point (PP) 20 Round Box 020892223325 $1.96/rd $39.26 In Stock 29d ago 2h ago Cape Gun Works
Remington Ammunition Premier Match 300 Blackout 125 gr Sierra MatchKing Open Tip Match 20 Per Box $1.96/rd $39.19 In Stock 5h ago 51m ago DEGUNS.NET
Remington .300 AAC Blackout Premier Match 125gr, MatchKing 20rd Box 047700410203 $1.96/rd $39.19 In Stock 87d ago 13m ago Impact Guns
Federal PFCX157F6 Premium Grand Slam 12 Gauge 3" 1 3/4 oz 6 Shot 10 Per Box $1.96/rd $19.59 In Stock 5h ago 51m ago DEGUNS.NET
BARNES 300BLK 110gr TTSX 20RD $1.96/rd $39.09 In Stock 8h ago 21m ago Gun Buyer
Barnes Precision Match .300 AAC Blackout Ammunition 20 Rounds 125 Grain Open Tip Match Boat Tail Projectile 2215fps 716876300129 $1.95/rd $39.06 In Stock 26d ago 24m ago Cheaper Than Dirt
Nosler 40127 Varmageddon 300 Blackout 110 gr Flat Base Tipped (FBT) 20 Bx/ 10 Cs 054041401272 $1.95/rd $38.99 In Stock 48d ago 4m ago Gulf Coast Gun & Outdoors
Sig Sauer E300H120 Elite Copper Hunting 300 Blackout 120 gr Open Tip Match (OTM) 20 Bx/ 10 Cs 798681552979 $1.95/rd $38.99 In Stock 16d ago 4m ago Gulf Coast Gun & Outdoors
BARNES VOR-TX RIFLE .300 aac blackout 120 grain tac tx boat tail 20 rounds 716876301201 $1.95/rd $38.99 In Stock 14h ago 52m ago Guns.com
Hornady .300 AAC Blackout 135 Grain Flex Tip Custom Centerfire Rifle Ammo .300 AAC Blackout 135 Grain SKU:2353113 $1.95/rd $38.99 In Stock 14d ago 13m ago Cabelas
Hornady .300 AAC Blackout 135 Grain Flex Tip Custom Centerfire Rifle Ammo .300 AAC Blackout 135 Grain SKU:2353113 $1.95/rd $38.99 In Stock 36d ago 37m ago Bass Pro Shops
Gorilla Ammunition .300 BlackOut 125gr Punisher Series – 20 Round Box $1.95/rd $38.99 In Stock 12d ago 28m ago Gorilla Ammunition
Gorilla Ammunition .300 BlackOut 115gr, Controlled Chaos, Pig Punisher – 20 Round Box $1.95/rd $38.99 In Stock 12d ago 28m ago Gorilla Ammunition
Liberty Overwatch Rifle Ammunition .300 Blackout 96gr HP 2500 fps 20/ct 20 Gauge rounds 691835874210 $1.95/rd $38.99 In Stock 29d ago 8m ago HD Tactical
Remington Ammunition Premier Match 21503 20 rounds 047700410203 $1.95/rd $38.99 In Stock 86d ago 19m ago Griswald Defense
Underwood Ammunition 300 AAC Blackout 125 Grain Nosler Ballistic Tip Box of 20 816874021160 $1.95/rd $38.99 In Stock 30d ago 2h ago MidwayUSA
NOVX Pentagon 300BLK125CP-20 850022779305 $1.95/rd $38.99 In Stock 44d ago 1h ago United Patriot Supply
FSM 300-115-SCV 300BO 115GR SCS TUI 20/25 758381721150 $1.95/rd $38.99 In Stock 49d ago 4m ago Gulf Coast Gun & Outdoors
Fusion MSR 300 Blackout 150 Grain $1.95/rd $38.99 In Stock 87d ago 6m ago Federal Ammunition
Sig Sauer E300H1SBR20 Elite Copper Duty 300 Blackout 120 gr Copper Solid 20 Bx/ 10 Cs 798681594214 $1.95/rd $38.99 In Stock 52d ago 4m ago Gulf Coast Gun & Outdoors
Underwood Ammo .300 AAC Blackout 220 Grain Hollowpoint Boat Tail Match Nickel Plated Brass Cased Rifle Ammo, 20 Rounds, 419 816874021177 $1.95/rd $38.99 In Stock 1d ago 32m ago Optics Planet
Barnes Bullets 30827 VOR-TX Rifle 300 Blackout 120 gr TAC-TX Boat Tail 20 Round Box 716876301201 $1.95/rd $38.99 In Stock 20h ago 2h ago Cape Gun Works
REMINGTON PREMIER .300 aac blackout sierra matchking otm 20 rounds 047700410203 $1.95/rd $38.99 In Stock 5d ago 52m ago Guns.com
Liberty Ammunition LAOW300962500 20 rounds 691835874210 $1.95/rd $38.99 In Stock 44d ago 1h ago United Patriot Supply
Liberty Ammunition LAOW300962500 20 rounds 691835874210 $1.95/rd $38.99 In Stock 100d ago 1h ago GunsInStock.com
LIBERTY LA-OW300-96-2500 300B 96G OVERWATCH 20/50 691835874210 $1.95/rd $38.93 In Stock 9d ago 1h ago Skogen’s Gun Supply
Federal Power-Shok Copper .300 Blackout Ammunition 20 Rounds 120 Grain LF Copper HP 2100fps 604544627756 $1.95/rd $38.91 In Stock 48d ago 24m ago Cheaper Than Dirt
Liberty Ammunition LAHAC300044 Animal Instinct 300 Blackout 96 gr Copper Hollow Point 20 Bx/ 10 Cs 019962272134 $1.94/rd $38.87 In Stock 3d ago 4m ago Acute Firearms
Hornady Custom .300AAC Blackout Ammo 110 Grain CX Projectile 20 rounds 090255720006 $1.94/rd $38.84 In Stock 20d ago 24m ago Cheaper Than Dirt
Remington Ammunition RM300AAC6 Premier Match 300 Blackout 125 gr Sierra MatchKing Open Tip Match (OTM) 20 Bx/ 10 Cs 047700410203 $1.94/rd $38.76 In Stock 17d ago 4m ago Acute Firearms
LIVERTY AMMUNITION Animal Instinct 300 AAC Blackout 96gr Copper Hollow Point Ammunition | 20 Rounds 019962272134 $1.94/rd $38.75 In Stock 9d ago 2h ago KyGunCo
HSM .300 Blackout, 220gr, HPBT Match King, 20rd Box 837306006784 $1.94/rd $38.69 In Stock 94d ago 13m ago Impact Guns
PREMIER MATCH AMMO 300 AAC BLACKOUT 125GR OPEN TIP MATCH 20 rounds 047700410203 $1.93/rd $38.64 In Stock 23d ago 44m ago Ammo Supply Warehouse
REMINGTON Premier Match 300 Blackout 125 gr Sierra MatchKing Open Tip Match Ammunition | 20 Rounds 047700410203 $1.93/rd $38.64 In Stock 9d ago 2h ago KyGunCo
SAKO JAS-TRG300BLK/220B 300BO 220G MTCHKING 20/10 082442959511 $1.93/rd $38.55 In Stock 17d ago 37m ago The Armory at LTT
300 AAC Blackout - 120 Grain TAC-TX BT - Barnes VOR-TX - 200 Rounds $1.92/rd $385.00 2 3d ago 18m ago Lucky Gunner
Sako TRG Defense 300 AAC Blackout Ammo 220 Grain Open Tip Match Box of 20 - brass case 082442974903 $1.92/rd $38.50 In Stock 35d ago 37m ago Target Sports USA
LIBERTY LA-OW300-96-2500 300B 96G OVERWATCH 20/50 691835874210 $1.92/rd $38.45 In Stock 9d ago 29m ago BattleHawk Armory
HSM Subsonic 300 BLK Ammunition, 20 Rounds, 220 Grain Sierra MatchKing, 1000 fps 837306006784 $1.92/rd $38.41 In Stock 30d ago 24m ago Cheaper Than Dirt
Sierra GameChanger .300 AAC Blackout Ammo 125 Grain TGK 20 Rounds 612710135424 $1.92/rd $38.32 In Stock 63d ago 24m ago Cheaper Than Dirt
HSM 300 Blackout 208gr, AMAX 20rd Box $1.92/rd $38.29 In Stock 94d ago 13m ago Impact Guns
Remington Core-Lokt Copper .300 BLK Ammo 120 Grain HP 047700278575 $1.91/rd $38.26 In Stock 20d ago 24m ago Cheaper Than Dirt
Colt Defense .300 Blackout Ammunition 20 Rounds Bonded SP 125 Grains 753387048553 $1.91/rd $38.19 In Stock 27d ago 24m ago Cheaper Than Dirt

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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