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 300BLK3N Game King 300 Blackout 125 gr Spitzer 20 Bx/ 10 Cs 837306007200 $1.33/rd $26.51 In Stock 17d ago 12m ago Acute Firearms
Sig Sauer E300A120 Elite Match Grade 300 Blackout 125 gr Open Tip Match (OTM) 20 Bx/ 25 Cs 798681514489 $1.42/rd $28.32 In Stock 17d ago 12m ago Acute Firearms
Sig Sauer E300A220 Elite Match Grade 300 Blackout 220 gr Open Tip Match (OTM) 20 Bx/ 25 Cs 798681514496 $1.42/rd $28.32 In Stock 17d ago 12m ago Acute Firearms
Barnes Bullets 30827 VOR-TX Rifle 300 Blackout 120 gr TAC-TX Boat Tail 20 Bx/ 10 Cs 716876301201 $1.88/rd $37.66 In Stock 17d ago 12m ago Acute Firearms
Nosler 51275 Match Grade 300 Blackout 220 gr Custom Competition 20 Bx/ 10 Cs 054041512756 $1.55/rd $30.99 In Stock 17d ago 12m ago Acute Firearms
Fiocchi 300BLKMB Extrema 300 Blackout 220 gr Sierra MatchKing Boat-Tail Hollow Point (BTHP) 25 Bx/ 20 Cs 762344711690 $1.16/rd $29.10 In Stock 6d ago 12m ago Acute Firearms
Remington Ammunition L300AAC4V UMC 300 Blackout 220 gr Open Tip Flat Base 50 Bx/ 8 Cs 047700490106 $1.31/rd $65.37 In Stock 17d ago 12m ago Acute Firearms
Winchester Ammo RED300 USA Ready 300 Blackout 125 gr Open Tip 20 Bx/ 10 Cs 020892226562 $1.15/rd $23.00 In Stock 9d ago 12m ago Acute Firearms
Sig Sauer E300H1SBR20 Elite Copper Duty 300 Blackout 120 gr Copper Solid 20 Bx/ 10 Cs 798681594214 $1.60/rd $32.02 In Stock 7d ago 12m ago Acute Firearms
Federal 300BLKB Power-Shok 300 Blackout 150 gr Soft Point (SP) 20 Bx/ 10 Cs 604544650488 $1.32/rd $26.49 In Stock 17d ago 12m ago Acute Firearms
Sierra A462510 GameChanger 300 Blackout 125 gr Tipped GameKing 20 Bx/ 10 Cs 612710135424 $1.29/rd $25.79 In Stock 17d ago 12m ago Acute Firearms
WINCHESTER SILVERTIP AMO 300BLK 150GR DEFENSE TIP 20RD (10 BOX CASE) 020892229891 $1.55/rd $30.99 In Stock 17d ago 12m ago Acute Firearms
FSM 300-115-SCV 300BO 115GR SCS TUI 20/25 758381721150 $1.61/rd $32.24 In Stock 15d ago 12m ago Acute Firearms
REM 26854 L300AAC2 UMC 300BO 150 FMJ 20/10 047700486406 $1.30/rd $25.97 In Stock 6d ago 12m ago Acute Firearms
REM 26857 L300AAC2BC UMC 300BO BKT 150 FMJ 160/4 047700486604 $1.18/rd $189.10 In Stock 17d ago 12m ago Acute Firearms
REM 20111 L300AAC4BC UMC 300BO BKT 220 OTFB 160/4 047700487403 $1.31/rd $208.97 In Stock 17d ago 12m ago Acute Firearms
REM 20107 L300AAC2BP UMC 300BO 150FMJ 200 LOOSE 047700487502 $1.26/rd $252.55 In Stock 2d ago 12m ago Acute Firearms
REM 20109 L300AAC4BP UMC 300BO 220OTFB 200 LOOSE 047700487601 $1.26/rd $252.55 In Stock 16d ago 12m ago Acute Firearms
NOVX 300BLK125CP-20 300BO 125G PENTAGON 20/10 850022779305 $1.33/rd $26.55 In Stock 3d ago 12m ago Acute Firearms
HORN 808794 CUSTOM 300BO 110 CX 25/10 090255720006 $1.26/rd $31.45 In Stock 17d ago 12m ago Acute Firearms
WIN USA 300BLK 147GR FMJ 20/10 020892231030 $1.08/rd $21.49 In Stock 17d ago 12m ago Acute Firearms
WIN X300BLK 300BO 150PSP PWRPNT 20/10 020892231924 $1.18/rd $23.49 In Stock 17d ago 12m ago Acute Firearms
SIERRA OTDMST 300BLK 115GR HP 20/200 092763600214 $1.12/rd $22.45 In Stock 17d ago 12m ago Acute Firearms
HSM 300BLK14N 300 BO 150 SPBT 20/25 810742029029 $1.15/rd $23.05 In Stock 17d ago 12m ago Acute Firearms
LEHIGH LA300BLK-115-CC 300BO 115 CNTRL CHAOS 20/10 810025508494 $2.50/rd $49.99 In Stock 17d ago 12m ago Acute Firearms
S&B eXergy Blue Solid Copper 300 Blackout 110gr 20/RD 754908512720 $1.20/rd $23.91 In Stock 12d ago 12m ago Acute Firearms
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 17d ago 12m ago Acute Firearms
BAR 300BLK 120GR JHP BT RANGE AR 20/10 716876120307 $1.19/rd $23.75 In Stock 17d ago 12m ago Acute Firearms
LIBERTY LA-OW300-96-2500 300B 96G OVERWATCH 20/50 691835874210 $2.07/rd $41.32 In Stock 8d ago 12m ago Acute Firearms
SAKO JAS-TRG300BLK/220B 300BO 220G MTCHKING 20/10 082442959511 $1.80/rd $36.01 In Stock 17d ago 12m ago Acute Firearms
HORN 80862 BLACK 300BO 110 NTX 20/10 090255808629 $1.54/rd $30.74 In Stock 17d ago 12m ago Acute Firearms
AMMOINC 300B168BTHP-A20 300B 168 BTHP 20/10 818778023608 $1.12/rd $22.50 In Stock 9d ago 12m ago Acute Firearms
Atomic 00465 Rifle Subsonic 300 Blackout 220 gr Hollow Point Boat Tail 50 Bx/ 10 Cs 858767004652 $1.35/rd $67.31 In Stock 2d ago 12m ago Acute Firearms
Sellier & Bellot Tactical 300 AAC Blackout 124gr FMJ Ammo 2165 FPS SuperSonic 20/box 754908512447 Free S/H over $250 $0.78/rd $15.49 In Stock 80d ago 2h ago AE Armory
Black Hills Ammunition 300 Blackout 125gr OTM / Open Tip Match 2100 FPS 1224 Ft/Lb 20/box 612710127580 Free S/H over $250 $1.59/rd $31.72 In Stock 148d ago 2h ago AE Armory
Black Hills Ammunition 300 Blackout 198gr Dual Performance Subsonic 1050 FPS 485 Ft/Lb Lead Free 20/box 612710136483 Free S/H over $250 $2.97/rd $59.37 In Stock 148d ago 2h ago AE Armory
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 233d ago 2h ago AE Armory
Sellier & Bellot Ammo 300 Blackout 200gr Subsonic 1060 FPS 20/box 754908512461 Free S/H over $250 $0.84/rd $16.89 In Stock 9d ago 2h ago AE Armory
Hornady 80881 Custom 300 Blackout 135 gr Flex Tip eXpanding (FTX) 20 Per Box/10 Cs 090255808810 $1.82/rd $36.29 In Stock 11d ago 47m ago Ammo Joy
Sellier & Bellot SB300BLKA Rifle 300 Blackout 124 gr Full Metal Jacket (FMJ) 20 Per Box/50 Cs 754908512447 $0.90/rd $17.89 In Stock 2d ago 47m ago Ammo Joy
Federal AE300BLK1 American Eagle 300 Blackout 150 gr Full Metal Jacket Boat-Tail (FMJBT) 20 Per Box/25 Cs 604544617009 $1.24/rd $24.89 In Stock 11d ago 47m ago Ammo Joy
Winchester Ammo X300BLKDS Deer Season XP 300 Blackout 150 gr Extreme Point 20 Per Box/10 Cs 020892222670 $1.60/rd $32.09 In Stock 11d ago 47m ago Ammo Joy
Hornady 80873 Black 300 Blackout 110 gr Hornady V-Max (VMX) 20 Per Box/10 Cs 090255808735 $1.56/rd $31.09 In Stock 11d ago 47m ago Ammo Joy
Federal F300BMSR2 Fusion MSR 300 Blackout 150 gr 1900 fps Fusion Soft Point 20 Bx/10 Cs 604544624113 $1.62/rd $32.39 In Stock 11d ago 47m ago Ammo Joy
Armscor FAC300AAC2N USA 300 Blackout 208 gr 1150 fps Hornady A-Max (AMX) 20 Bx/10 Cs 812285021775 $1.65/rd $32.99 In Stock 11d ago 47m ago Ammo Joy
Winchester Ammo USA300BLK USA 300 Blackout 125 gr 2185 fps Open Tip Range 20 Bx/10 Cs 020892224568 $0.96/rd $19.19 In Stock 21h ago 47m ago Ammo Joy
Nosler 40127 Varmageddon 300 Blackout 110 gr 2200 fps Flat Base Tipped (FBT) 20 Bx/10 Cs 054041401272 $1.86/rd $37.29 In Stock 11d ago 47m ago Ammo Joy
Remington Ammunition 21422 UMC 300 Blackout 220 gr 1015 fps Open Tip Flat Base (OTFB) 20 Bx/10 Cs 047700414805 $1.56/rd $31.09 In Stock 11d ago 47m ago Ammo Joy
HSM 300BLK1N Match 300 Blackout 208 gr Hornady A-Max (AMX) 20 Per Box/25 Cs 837306006777 $1.58/rd $31.59 In Stock 11d ago 47m ago Ammo Joy
Sig Sauer E300A120 Marksman 300 Blackout 125 gr 2200 fps Open Tip Match (OTM) 20 Bx/25 Cs 798681514489 $1.62/rd $32.39 In Stock 11d ago 47m ago Ammo Joy

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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