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
HSM 300 Blackout Ammunition HSM-300BLK-4-N 220 Grain Sierra MatchKing Subsonic Hollow Point 20 Rounds 837306006784 $1.85/rd $36.99 In Stock 171d ago 53m ago Outdoor Limited
WINCHESTER DEER SEASON XP .300 aac blackout 150 grain extreme point 20 rounds 020892222670 $1.85/rd $36.99 In Stock 50d ago 47m ago Guns.com
Sig Sauer Elite Performance Hunting HT Ammunition 300 AAC Blackout 120 Grain Solid Copper Lead-Free Expanding Box of 20 798681552979 $1.85/rd $36.99 In Stock 28d ago 6m ago MidwayUSA
Gorilla 300 AAC BlackOut Subsonic 220gr Sierra MatchKing – 20 Round Box $1.85/rd $36.99 In Stock 370d ago 24m ago Gorilla Ammunition
Remington Premier Match Rifle Ammunition .300 AAC Blackout 125 gr OTM 2215 fps 20/ct 20 Gauge rounds 047700410203 $1.85/rd $36.99 In Stock 48d ago 3m ago HD Tactical
UMC Centerfire Rifle 300 Blackout 220 Grain $1.85/rd $36.99 In Stock 9d ago 57m ago Remington Ammunition
NOVX NOVX 300BLK110CE20 859959007864 $1.85/rd $36.99 In Stock 20d ago 14m ago Griswald Defense
UMC Centerfire Rifle 300 Blackout 150 Grain $1.85/rd $36.99 In Stock 9d ago 57m ago Remington Ammunition
Underwood Ammo .300 AAC Blackout 125 Grain Polymer Tipped Spitzer Nickel Plated Brass Cased Rifle Ammo, 20 Rounds, 418 816874021160 $1.85/rd $36.99 In Stock 2d ago 1h ago Optics Planet
HORN 80862 BLACK 300BO 110 NTX 20/10 090255808629 $1.85/rd $36.99 In Stock 93d ago 12s ago Gulf Coast Gun & Outdoors
Nosler Match Grade Custom Competition 51275 20 rounds 054041512756 $1.85/rd $36.99 In Stock 48d ago 11m ago Sahuarita Guns
Remington Ammunition Premier Match 21503 20 rounds 047700410203 $1.85/rd $36.99 In Stock 85d ago 1h ago GunsInStock.com
Gorilla 300 AAC BlackOut Subsonic 215gr Berger Hybrid Target – 20 Round box $1.85/rd $36.99 In Stock 11d ago 24m ago Gorilla Ammunition
Barnes Bullets Subsonic 32134 20 rounds 716876300228 $1.85/rd $36.99 In Stock 20d ago 14m ago Griswald Defense
Hornady Custom Ammunition 300 AAC Blackout 110 Grain CX Polymer Tip Lead Free Box of 20 090255720006 $1.85/rd $36.99 In Stock 29d ago 6m ago MidwayUSA
NOVX NOVX 300BLK110CE20 859959007864 $1.85/rd $36.99 In Stock 20d ago 35m ago Elite FIrearms Online
Silver State Armory 300 AAC Blackout Ammo - 20 Rounds of 220 Grain... $1.85/rd $36.99 In Stock 6d ago 17m ago Ammo.com
Hornady 82246 Black 450 Bushmaster, 250 gr Flex Tip eXpanding, 20 Per Box $1.84/rd $36.89 In Stock 3d ago 47m ago DEGUNS.NET
Barnes Bullets 21548 VOR-TX Rifle 300 Blackout 110 gr TAC-TX Flat Base 20 Bx/ 10 Cs 716876130115 $1.84/rd $36.89 In Stock 8d ago 30m ago Guns 2 Ammo
SIG Sauer Elite Performance .300 AAC Blackout Ammunition 20 Rounds 125 Grain Open Tip Match 2200fps 798681514489 $1.84/rd $36.85 In Stock 33d ago 18m ago Cheaper Than Dirt
Federal Fusion .300 AAC Blackout Ammo 150 Grain Fusion SP 20 rounds 604544624113 $1.84/rd $36.81 In Stock 17d ago 18m ago Cheaper Than Dirt
Underwood 300 Aac 220gr Match - Hpbt 20rd 10bx/cs 816874021177 $1.83/rd $36.64 In Stock 13d ago 30m ago Tactical Surplus USA
Barnes Bullets Precision Match 300 Blackout, 220gr, JHP, 20Bx/10Cs 716876300228 $1.83/rd $36.59 In Stock 20d ago 9m ago Impact Guns
Federal GM65CRDBH130 Premium Gold Medal 6.5 Creedmoor 130 gr Berger Hybrid Open Tip Match 20 Bx $1.83/rd $36.59 In Stock 3d ago 47m ago DEGUNS.NET
Remington Ammunition RM300AAC6 Premier Match 300 Blackout 125 gr Sierra MatchKing Open Tip Match (OTM) 20 Bx/ 10 Cs 047700410203 $1.82/rd $36.50 In Stock 22d ago 1h ago Skogen’s Gun Supply
Fort Scott Munitions .300 BlackOut 150 Grain CNC Machined Copper Brass Riffle Ammo, 20 Rounds, 300-150-SCV 758381722072 $1.82/rd $36.49 In Stock 2d ago 1h ago Optics Planet
Nosler 40127 Varmageddon 300 Blackout 110 gr Flat Base Tipped (FBT) 20 Per Box/ 20 Cs 20.0 rounds 054041401272 $1.82/rd $36.40 In Stock 27d ago 9m ago DB Firearms
Sako Cartridges 300 Blackout, 220gr, Subsonic, 20rd Box 082442959511 $1.82/rd $36.39 In Stock 93d ago 9m ago Impact Guns
SAKO (TIKKA) MatchKing 300 Blackout 220 gr 20 Per Box $1.82/rd $36.39 In Stock 3d ago 47m ago DEGUNS.NET
NOS AMMO 300BLK 125GR BT 20 Round Box 054041610322 $1.82/rd $36.34 In Stock 28d ago 2h ago Cape Gun Works
Hornady 80881 Custom 300 Blackout 135 gr Flex Tip eXpanding (FTX) 20 Per Box/10 Cs 090255808810 $1.82/rd $36.29 In Stock 10d ago 1h ago Ammo Joy
Nosler Match Grade 300 Blackout 220 gr Custom Competition Hollow Point Boat Tail 20 Per Box $1.82/rd $36.29 In Stock 9h ago 47m ago DEGUNS.NET
Gorilla Ammunition .300 BlackOut 125gr Punisher Series – 160 Round Bucket $1.81/rd $289.99 In Stock 11d ago 24m ago Gorilla Ammunition
Winchester Ammo X300BLKX Super-X 300 Blackout 200 gr Power-Point (PP) 20 Bx/ 10 Cs 020892223325 $1.81/rd $36.24 In Stock 17d ago 53m ago SHTF Tactical
Hornady Custom .300 AAC Blackout Ammunition 20 Rounds FTX 135 Grains 80881 090255808810 $1.81/rd $36.21 In Stock 21d ago 18m ago Cheaper Than Dirt
Underwood Ammo Match Nickel Plated Brass .300 AAC Blackout 220 Grain 20-Rounds HPBT 816874021177 $1.81/rd $36.19 In Stock 13d ago 37m ago GrabAGun.com
Barnes Bullets 32134 Subsonic 300 Blackout 220 gr Jacketed Hollow Point (JHP) 20 Per Box/10 Cs 716876300228 $1.81/rd $36.19 In Stock 15d ago 29m ago Acute Firearms
NOVX AMMO 300BLK 110GR CE 20/10 859959007864 $1.81/rd $36.18 In Stock 15d ago 29m ago Acute Firearms
Atomic Subsonic 300 Blackout 220 gr, HPB Tail 50rd Box 858767004652 $1.81/rd $90.39 In Stock 2d ago 9m ago Impact Guns
Liberty Ammunition LAHAC300044 Animal Instinct 300 Blackout 96 gr Copper Hollow Point 20 Bx/ 10 Cs 019962272134 $1.81/rd $36.16 In Stock 13d ago 24m ago BattleHawk Armory
Doubletap Ammunition .300 AAC BLACKOUT, 110gr, SCTHP - 20 Rounds [MPN: 300BK110X] 091037282453 $1.81/rd $36.15 In Stock 52d ago 20m ago Firearms Depot
Barnes Bullets 30827 VOR-TX Rifle 300 Blackout 120 gr TAC-TX Boat Tail 20 Bx/ 10 Cs 716876301201 $1.81/rd $36.13 In Stock 13d ago 24m ago BattleHawk Armory
BARNES AMMUNITION 300 Blackout 110gr Tax-TX FB 20 rounds 716876130115 $1.81/rd $36.13 In Stock 13d ago 24m ago BattleHawk Armory
Gorilla 300 AAC BlackOut Subsonic 220gr Sierra MatchKing – 160 Round Bucket $1.81/rd $289.00 In Stock 11d ago 24m ago Gorilla Ammunition
Gorilla 300 AAC BlackOut Subsonic 215gr Berger Hybrid Target – 160 Round Bucket $1.81/rd $289.00 In Stock 11d ago 24m ago Gorilla Ammunition
Gorilla 300 AAC BlackOut 110gr Barnes TAC-TX – 160 Round Bucket $1.81/rd $289.00 In Stock 11d ago 24m ago Gorilla Ammunition
Remington Ammunition RM300AAC6 Premier Match 300 Blackout 125 gr Sierra MatchKing Open Tip Match (OTM) 20 Bx/ 10 Cs 047700410203 $1.80/rd $36.06 In Stock 13d ago 24m ago BattleHawk Armory
Cor-Bon DPX300AAC110 DPX 300 AAC Blackout TDPX 110 GR 20Rds 757750300118 $1.80/rd $36.05 In Stock 13d ago 26m ago White Birch Armory
SAKO JAS-TRG300BLK/220B 300BO 220G MTCHKING 20/10 082442959511 $1.80/rd $36.01 In Stock 15d ago 29m ago Acute Firearms
300 AAC Blackout - 220 Grain OTFB - Remington Subsonic - 20 Rounds 047700479903 $1.80/rd $36.00 37 132d ago 13m 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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