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
Grizzly .300 Blackout - 150GR Soft Point - New Brass - 20rd BOX $1.05/rd $20.99 In Stock 92d ago 13m ago 2A Warehouse
Capital Cartridge .300 Blackout 147GR FMJ - REMAN - 300 Rounds With Free Ammo Can $0.50/rd $149.99 In Stock 1d ago 13m ago 2A Warehouse
Capital Cartridge .300 Blackout 147GR FMJ - REMAN - 50RD Box $0.52/rd $26.25 In Stock 24d ago 13m ago 2A Warehouse
Nosler Match Grade Custom Competition 7.62 x 35mm 220-Grain Centerfire Rifle Ammunition $4.28/rd $29.99 In Stock 2d ago 1h ago Academy
Winchester Deer Season XP 300 Blackout 150-Grain Rifle Ammunition - 20 Rounds $1.75/rd $34.99 In Stock 6h ago 3h ago Academy
Hornady 300 Blackout 208-Grain BTHP Ammunition - 20 Rounds $1.35/rd $26.99 In Stock 2d ago 1h ago Academy
Winchester USA .300 Blackout 147-Grain Full Metal Jacket Ammunition - 20 Rounds $1.25/rd $24.99 In Stock 6h ago 3h ago Academy
BARNES 300AAC Blackout 120-Grain Ammunition - 20 Rounds $1.25/rd $24.99 In Stock 6h ago 3h ago Academy
Remington UMC .300 AAC Blackout 150-Grain Centerfire Ammunition - 20 Rounds $1.50/rd $29.99 In Stock 2d ago 1h ago Academy
Winchester .300 Blackout 125-Grain Centerfire Rifle Ammunition - 20 Rounds $1.35/rd $26.99 In Stock 3h ago 3h ago Academy
Frontier .300 Blackout 125-Grain FMJ Rifle Ammunition - 20 Rounds $1.15/rd $22.99 In Stock 6h ago 3h ago Academy
Remington .300 AAC Blackout Bulk Range FMJ Rifle Ammunition - 200 Rounds $1.25/rd $249.99 In Stock 6h ago 3h ago Academy
Remington UMC .300 AAC Blackout 150-Grain Centerfire Ammunition - 50 Rounds $1.40/rd $69.99 In Stock 6h ago 3h ago Academy
SIG SAUER Elite Performance Hunting .300 AAC Blackout 120-Grain Centerfire Rifle Ammunition - 20 Rounds $1.75/rd $34.99 In Stock 6h ago 3h ago Academy
BARNES VOR-TX .300 AAC Blackout/Whisper 120-Grain TAC-TX Boat Tail Centerfire Rifle Ammunition $2.00/rd $39.99 In Stock 6h ago 3h ago Academy
Federal American Eagle Training Full Metal Jacket Boat-Tail .300 Blackout 150-Grain Ammunition - 20 Rounds $1.25/rd $24.99 In Stock 6h ago 3h ago Academy
Winchester Power Point 300 Blackout 150-Grain Ammunition - 20 Rounds $1.35/rd $26.98 In Stock 6h ago 3h ago Academy
Fiocchi Rifle Shooting Dynamics 7.62 x 35mm Blackout/Whisper 150-Grain Centerfire Rifle Ammunition $49.99/rd $49.99 In Stock 3h ago 3h ago Academy
Fiocchi 300BLKC Training Dynamics 300 Blackout 150 gr Full Metal Jacket Boat Tail (FMJBT) 50 Bx/ 10 Cs 762344711010 $0.77/rd $38.52 In Stock 15d ago 7m ago Acute Firearms
Hornady 80881 Custom 300 Blackout 135 gr Flex Tip eXpanding 20 Bx/ 10 Cs 090255808810 $1.42/rd $28.39 In Stock 1d ago 7m ago Acute Firearms
Sellier & Bellot 300BLKA Rifle 300 Blackout 124 gr Full Metal Jacket 20 Bx/ 50 Cs 754908512447 $0.92/rd $18.29 In Stock 8h ago 7m ago Acute Firearms
Sellier & Bellot 300BLKB Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 50 Cs 754908512454 $0.92/rd $18.38 In Stock 16d ago 7m ago Acute Firearms
Federal AE300BLK1 American Eagle 300 Blackout 150 gr Full Metal Jacket Boat Tail (FMJBT) 20 Bx/ 25 Cs 604544617009 $1.17/rd $23.45 In Stock 16d ago 7m ago Acute Firearms
Winchester Ammo X300BLKDS Deer Season XP 300 Blackout 150 gr Extreme Point 20 Bx/ 10 Cs 020892222670 $1.35/rd $26.99 In Stock 6d ago 7m ago Acute Firearms
Sig Sauer E300H120 Elite Copper Hunting 300 Blackout 120 gr Open Tip Match (OTM) 20 Bx/ 10 Cs 798681552979 $1.55/rd $30.99 In Stock 16d ago 7m ago Acute Firearms
Hornady 80873 Black 300 Blackout 110 gr V-Max 20 Bx/ 10 Cs 090255808735 $1.39/rd $27.80 In Stock 16d ago 7m ago Acute Firearms
Hornady 80891 Black 300 Blackout 208 gr A-Max 20 Bx/ 10 Cs 090255808919 $1.40/rd $28.07 In Stock 16d ago 7m ago Acute Firearms
Federal F300BMSR2 Fusion MSR 300 Blackout 150 gr Fusion Soft Point 20 Bx/ 10 Cs 604544624113 $1.45/rd $29.02 In Stock 16d ago 7m ago Acute Firearms
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs 812285021089 $0.90/rd $17.95 In Stock 8h ago 7m ago Acute Firearms
Armscor FAC300AAC2N Rifle 300 Blackout 208 gr A-Max 20 Bx/ 10 Cs 812285021775 $1.45/rd $29.00 In Stock 6d ago 7m ago Acute Firearms
Armscor FAC300AAC3N Rifle 300 Blackout 220 gr Boat Tail Hollow Point (BTHP) 20 Bx/ 10 Cs 812285022048 $1.32/rd $26.35 In Stock 2d ago 7m ago Acute Firearms
Winchester Ammo SUP300BLK Super Suppressed 300 Blackout 200 gr Open Tip Range 20 Bx/ 10 Cs 020892224483 $1.06/rd $21.30 In Stock 16d ago 7m ago Acute Firearms
Winchester Ammo USA300BLK USA 300 Blackout 125 gr Open Tip Range 20 Bx/ 10 Cs 020892224568 $0.94/rd $18.88 In Stock 1d ago 7m ago Acute Firearms
Winchester Ammo USA300BLKX USA 300 Blackout 200 gr Open Tip Range 20 Bx/ 10 Cs 020892224582 $1.06/rd $21.20 In Stock 4d ago 7m ago Acute Firearms
Federal AE300BLKSUP2 American Eagle Suppressor 300 Blackout 220 gr Open Tip Match (OTM) 20 Bx/ 25 Cs 029465064617 $1.30/rd $25.99 In Stock 16d ago 7m ago Acute Firearms
Nosler 40127 Varmageddon 300 Blackout 110 gr Flat Base Tipped (FBT) 20 Bx/ 10 Cs 054041401272 $1.45/rd $28.99 In Stock 15d ago 7m ago Acute Firearms
Remington Ammunition L300AAC4 UMC 300 AAC Blackout 220 GR Open Tip Flat Base (OTFB) 20 Bx/ 10 Cs 047700414805 $1.38/rd $27.49 In Stock 16d ago 7m ago Acute Firearms
HSM 300BLK1N Match 300 Blackout 208 gr A-Max 20 Bx/ 25 Cs 837306006777 $1.39/rd $27.75 In Stock 16d ago 7m ago Acute Firearms
HSM 300BLK3N Game King 300 Blackout 125 gr Spitzer 20 Bx/ 10 Cs 837306007200 $1.33/rd $26.51 In Stock 16d ago 7m 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 16d ago 7m 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 16d ago 7m ago Acute Firearms
Fiocchi 300BLKHA Extrema 300 Blackout 125 gr SST 25 Bx/ 20 Cs 762344711188 $1.06/rd $26.40 In Stock 16d ago 7m 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 16d ago 7m 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 5d ago 7m 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 16d ago 7m 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 8d ago 7m ago Acute Firearms
Frontier Cartridge FR400 Rifle 300 Blackout 125 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs 090255713978 $1.05/rd $20.99 In Stock 16d ago 7m 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 16d ago 7m ago Acute Firearms
Sierra A462510 GameChanger 300 Blackout 125 gr Tipped GameKing 20 Bx/ 10 Cs 612710135424 $1.29/rd $25.79 In Stock 16d ago 7m ago Acute Firearms
Sig Sauer E300B120 Elite Performance 300 Blackout 125 gr Full Metal Jacket (FMJ) 20 Bx/ 25 Cs 798681619634 $1.07/rd $21.36 In Stock 7d ago 7m ago Acute Firearms

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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