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
REMINGTON 300 Blackout 150FMJ Rifle Ammunition 200rd BOX 047700487502 $1.25/rd $250.61 In Stock 2d ago 11m ago BattleHawk Armory
Fiocchi 300BLKHA Extrema 300 Blackout 125 gr SST 25 Bx/ 20 Cs 762344711188 $0.96/rd $23.93 In Stock 15d ago 11m ago BattleHawk Armory
Winchester Ammo Super Suppressed 300 Blackout 200 gr Open Tip Range Subsonic Ammunition - 20rd Box 020892224483 $1.09/rd $21.88 In Stock 7d ago 11m ago BattleHawk Armory
UNDERWOOD AMMO .300AAC 115GR. CONTROLLED CHAOS 20-PACK 816874020811 $2.54/rd $50.75 In Stock 5d ago 11m ago BattleHawk Armory
WILSON COMBAT 300 BLACKOUT 220GR, SIERRA HPBT, 1025 FPS (SUB-SONIC), 20 RD BOX 874218007478 $1.70/rd $33.95 In Stock 15d ago 11m ago BattleHawk Armory
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 15d ago 11m ago BattleHawk Armory
Sig Sauer Elite Match Grade 300 Blackout 125 gr Open Tip Match (OTM) Rifle Ammunition 20 rd Box 798681514489 $1.27/rd $25.32 In Stock 3d ago 11m ago BattleHawk Armory
NOVX AMMO 300 BLACKOUT 110GR CLOSE ENCOUNTER RIFLE AMMUNITION 20 RD BOX 859959007864 $1.74/rd $34.71 In Stock 15d ago 11m ago BattleHawk Armory
HSM 300BLK1N Match 300 Blackout 208 gr A-Max 20 Bx/ 25 Cs 837306006777 $1.27/rd $25.48 In Stock 15d ago 11m ago BattleHawk Armory
WILSON COMBAT 300 BLACKOUT 110GR, HORNADY V-MAX, 2350FPS, 20 RD BOX 811826024800 $1.70/rd $33.95 In Stock 15d ago 11m ago BattleHawk Armory
WIN X300BLK 300BO 150PSP PWRPNT 20/10 020892231924 $0.96/rd $19.12 In Stock 15d ago 11m ago BattleHawk Armory
Armscor FAC300AAC3N Rifle 300 Blackout 220 gr Boat Tail Hollow Point (BTHP) 20 Bx/ 10 Cs 812285022048 $1.17/rd $23.35 In Stock 4d ago 11m ago BattleHawk Armory
NOS AMMO 300BLK 125GR BT 20/10 054041610322 $1.56/rd $31.30 In Stock 15d ago 11m ago BattleHawk Armory
SIERRA OUTDOOR MASTER 300BLK 115GR HP RIFLE AMMUNITION 20rd BOX 092763600214 $0.98/rd $19.54 In Stock 15d ago 11m ago BattleHawk Armory
HORNADY 808794 CUSTOM 300 Blackout 110 CX Rifle Ammunition 20rd Box 090255720006 $1.47/rd $29.39 In Stock 15d ago 11m ago BattleHawk Armory
Barnes Bullets 32134 Subsonic 300 Blackout 220 gr Jacketed Hollow Point (JHP) 20 Per Box/10 Cs 716876300228 $1.68/rd $33.68 In Stock 15d ago 11m ago BattleHawk Armory
LIBERTY LA-OW300-96-2500 300B 96G OVERWATCH 20/50 691835874210 $1.92/rd $38.45 In Stock 9d ago 11m ago BattleHawk Armory
Sig Sauer 300 Blackout 120 gr Short Barrel (SBR) Copper Solid 798681594214 $1.40/rd $27.98 In Stock 15d ago 11m ago BattleHawk Armory
HSM 300BLK3N Game King 300 Blackout 125 gr Spitzer 20 Bx/ 10 Cs 837306007200 $1.20/rd $24.09 In Stock 15d ago 11m ago BattleHawk Armory
Black Hills Ammunition 300 AAC Blackout Whisper 125gr Open Tip Match Ammo OTM 20rd Box 612710127580 $1.50/rd $29.99 In Stock 15d ago 11m ago BattleHawk Armory
Winchester Ammo Silvertip AMO 300 BLK 150 Gr Defense Tip 20rds 020892229891 $1.64/rd $32.88 In Stock 15d ago 11m ago BattleHawk Armory
Sig Sauer E300H120 Elite Copper Hunting 300 Blackout 120 gr Open Tip Match (OTM) 20 Bx/ 10 Cs 798681552979 $1.45/rd $29.05 In Stock 6d ago 11m ago BattleHawk Armory
Fort Scott Munitions 300 Blackout 115 gr SCS Tumble Upon Impact (TUI) 20rd Box 758381721150 $1.68/rd $33.64 In Stock 15d ago 11m ago BattleHawk Armory
Fort Scott Munitions 300 Blackout 190 gr Tumble Upon Impact (TUI) Subsonic 20rd Box 758381721235 $1.75/rd $34.97 In Stock 15d ago 11m ago BattleHawk Armory
Fort Scott Munitions 300 Blackout 150 gr SCS Tumble Upon Impact (TUI) 20rd Box 758381722072 $1.71/rd $34.27 In Stock 15d ago 11m ago BattleHawk Armory
NOVX .300 Blackout Pentagon 125 Gr Monolithic Copper Hollow Point 20rds 850022779305 $2.00/rd $39.99 In Stock 15d ago 11m ago BattleHawk Armory
Barnes Precision Match 300 Blackout 125 Gr Open Tip Match BT 20rds 716876300129 $1.39/rd $27.88 In Stock 15d ago 11m ago BattleHawk Armory
Sig Sauer E300H1-BC-20 Elite Copper Hunting 300 Blackout 120 Gr OTM 20rds 798681665433 $1.25/rd $24.99 In Stock 15d ago 11m ago BattleHawk Armory
REM 20111 L300AAC4BC UMC 300BO BKT 220 OTFB 160rd Pail 047700487403 $1.25/rd $200.45 In Stock 15d ago 11m ago BattleHawk Armory
REM 20109 L300AAC4BP UMC 300BO 220OTFB 200 LOOSE 047700487601 $1.25/rd $250.87 In Stock 15d ago 11m ago BattleHawk Armory
Fiocchi Extrema 300 Blackout 220 gr Sierra MatchKing Boat-Tail Hollow Point (BTHP) Subsonic Ammunition 25rd Box 762344711690 $1.08/rd $26.99 In Stock 7d ago 11m ago BattleHawk Armory
REM 26854 L300AAC2 UMC 300BO 150 FMJ 20/10 047700486406 $1.18/rd $23.49 In Stock 7d ago 11m ago BattleHawk Armory
UNDERWOOD AMMO .300AAC 125GR. BALLISTIC TIP 20-PACK 816874021160 $1.62/rd $32.45 In Stock 15d ago 11m ago BattleHawk Armory
UNDERWOOD AMMO .300AAC 194GR. SUBSONIC 20-PACK 816874022570 $3.44/rd $68.85 In Stock 4d ago 11m ago BattleHawk Armory
DOUBLETAP 300BLK 110GR SC-THP AMMUNITION 20rd BOX 091037282453 $1.79/rd $35.83 In Stock 15d ago 11m ago BattleHawk Armory
DOUBLETAP COLT DEFENSE 300BLK 125GR TMK 20rd BOX 753387048553 $1.38/rd $27.62 In Stock 15d ago 11m ago BattleHawk Armory
S&B eXergy Blue Solid Copper 300 Blackout 110gr 20/RD 754908512720 $1.06/rd $21.18 In Stock 13d ago 11m ago BattleHawk Armory
UNDERWOOD 300 AAC 220GR MATCH HPBT 20RD BOX 816874021177 $1.71/rd $34.25 In Stock 15d ago 11m ago BattleHawk Armory
300 AAC Blackout 110 Grain Varmageddon Ammo 20 Rnd 816874021153 $1.56/rd $31.24 In Stock 15d ago 11m ago BattleHawk Armory
Winchester Ammo X300BLKDS Deer Season XP 300 Blackout 150 gr Extreme Point 20 Box 020892222670 $1.00/rd $20.01 In Stock 8d ago 11m ago BattleHawk Armory
Federal 300BLK150LFA Power-Shok 300 Blackout 120 gr Copper Hollow Point 20 Bx/ 25 Cs 604544627756 $1.50/rd $30.05 In Stock 15d ago 11m ago BattleHawk Armory
Maxim Defense .300 Blackout 115 Gr TUI Short Barrel Ammunition 20rds 680017490041 $1.44/rd $28.88 In Stock 15d ago 11m ago BattleHawk Armory
Remington Ammo 26857 UMC .300 Blackout 150 Gr Full Metal Jacket (FMJ) 160rds Freedom Bucket 047700486604 $1.13/rd $181.41 In Stock 15d ago 11m ago BattleHawk Armory
Winchester Ammo X300BLKX Super-X 300 Blackout 200 gr Power-Point (PP) 20 Bx/ 10 Cs 020892223325 $1.69/rd $33.82 In Stock 15d ago 11m ago BattleHawk Armory
REM CORE LOKT 300BLK 120GR COPPER HP 20/10 047700278575 $1.45/rd $28.95 In Stock 15d ago 11m ago BattleHawk Armory
Sierra Ammunition | GameChanger .300 AAC Blackout | 125 Grain Sierra Tipped GameKing | 20rd $2.10/rd $41.99 In Stock 29d ago 33m ago Bear Creek Arsenal
Remington Ammunition L300AAC4 UMC 300 AAC Blackout 220 GR Open Tip Flat Base (OTFB) 20 Bx/ 10 Cs 047700414805 $1.24/rd $24.73 In Stock 17d ago 7m ago Beebe Family Arms & Munitions
Winchester Ammo X300BLKDS Deer Season XP 300 Blackout 150 gr Extreme Point 20 Bx/ 10 Cs 020892222670 $1.28/rd $25.57 In Stock 17d ago 7m ago Beebe Family Arms & Munitions
Winchester Ammo USA300BLK USA 300 Blackout 125 gr Open Tip Range 20 Bx/ 10 Cs 020892224568 $0.76/rd $15.25 In Stock 24h ago 7m ago Beebe Family Arms & Munitions
HSM 300BLK1N Match 300 Blackout 208 gr A-Max 20 Bx/ 25 Cs 837306006777 $1.26/rd $25.14 In Stock 17d ago 7m ago Beebe Family Arms & Munitions

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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