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
Winchester USA Ready 300 AAC Blackout Ammo 125 Grain Full Metal Jacket Open Tip - 200 Rounds - Free Shipping! 020892226562 $0.80/rd $160.00 In Stock 28d ago 2h ago Bereli
Sellier & Bellot 300 Blackout 147 Grain Full Metal Jacket - 1000 Rounds - Free Shipping! 754908512454 $0.76/rd $765.00 In Stock 70d ago 2h ago Bereli
Sellier & Bellot 300 Blackout 147 Grain Full Metal Jacket - 500 Rounds - Free Shipping! 754908512454 $0.78/rd $390.00 In Stock 70d ago 2h ago Bereli
Sellier & Bellot SB300BLKXA eXergy 300 Blackout 110 gr TAC EX Blue 20 Per Box/ 50 Case - 100 Rounds - Free Shipping! 754908512720 $1.10/rd $109.99 In Stock 48d ago 2h ago Bereli
Sellier & Bellot SB300BLKXA eXergy 300 Blackout 110 gr TAC EX Blue 20 Per Box/ 50 Case - 1000 Rounds - Free Shipping! 754908512720 $1.02/rd $1019.99 In Stock 48d ago 2h ago Bereli
Sellier & Bellot SB300BLKXA eXergy 300 Blackout 110 gr TAC EX Blue 20 Per Box/ 50 Case - 500 Rounds - Free Shipping! 754908512720 $1.04/rd $519.99 In Stock 48d ago 2h ago Bereli
Fiocchi Range Dynamics 300 Blackout 150 gr Full Metal Jacket Boat-Tail - 250 Rounds - Free Shipping! 762344711010 $0.75/rd $186.99 In Stock 14d ago 2h ago Bereli
Fiocchi Range Dynamics 300 Blackout 150 gr Full Metal Jacket Boat-Tail - 50 Rounds -Free Shipping! 762344711010 $0.86/rd $42.99 In Stock 14d ago 2h ago Bereli
Fiocchi Range Dynamics 300 Blackout 150 gr Full Metal Jacket Boat-Tail - 500 Rounds - Free Shipping! 762344711010 $0.71/rd $353.99 In Stock 14d ago 2h ago Bereli
Fiocchi 300BLKHA Hyperformance 300 Blackout 125 gr Super Shock Tip - 100 Rounds - Free Shipping! $1.09/rd $109.00 In Stock 14d ago 2h ago Bereli
Fiocchi 300BLKHA Hyperformance 300 Blackout 125 gr Super Shock Tip - 1000 Rounds - Free Shipping! $0.99/rd $989.00 In Stock 14d ago 2h ago Bereli
Fiocchi 300BLKHA Hyperformance 300 Blackout 125 gr Super Shock Tip - 500 Rounds - Free Shipping! $1.00/rd $499.00 In Stock 14d ago 2h ago Bereli
Barnes Bullets VOR-TX 300 Blackout 120 Grain TAC-TX Boat Tail Ammunition - 30827 - 100 Rounds - Free Shipping! $1.75/rd $174.99 In Stock 14d ago 2h ago Bereli
Barnes Bullets VOR-TX 300 Blackout 120 Grain TAC-TX Boat Tail Ammunition - 30827 - 20 Rounds - Free Shipping! $2.00/rd $39.99 In Stock 14d ago 2h ago Bereli
HSM Subsonic A-Max 300BLK1N 20 rounds 837306006777 $1.15/rd $22.99 In Stock 6d ago 38m ago BFG Outfitters
Winchester Repeating Arms USA300BLK 20 rounds 020892224568 $0.75/rd $14.99 In Stock 6d ago 38m ago BFG Outfitters
Sig Sauer SIG E300B120 798681619634 $0.85/rd $16.99 In Stock 6d ago 38m ago BFG Outfitters
Federal FDR 300BLK 150GR SP PWR-SHK 20 rounds 604544650488 $1.15/rd $22.99 In Stock 6d ago 38m ago BFG Outfitters
Federal Fusion MSR Medium Game F300BMSR2 20 rounds 604544624113 $0.92/rd $18.49 In Stock 6d ago 38m ago BFG Outfitters
Barnes Bullets VOR-TX Rifle 21548 20 rounds 716876130115 $2.20/rd $43.99 In Stock 21d ago 38m ago BFG Outfitters
Barnes Bullets VOR-TX Rifle 30827 20 rounds 716876301201 $2.20/rd $43.99 In Stock 21d ago 38m ago BFG Outfitters
HSM Subsonic HPBT 300BLK4N 20 rounds 837306006784 $1.35/rd $26.99 In Stock 6d ago 38m ago BFG Outfitters
HSM Game King Spitzer 300BLK3N 20 rounds 837306007200 $1.10/rd $21.99 In Stock 6d ago 38m ago BFG Outfitters
Armscor 300BO FMJ FAC300AAC1N 20 rounds 812285021089 $0.65/rd $12.99 In Stock 6d ago 38m ago BFG Outfitters
Federal American Eagle FMJBT AE300BLK1 20 rounds 604544617009 $0.95/rd $18.99 In Stock 6d ago 38m ago BFG Outfitters
Remington Ammunition Subsonic 300 ACC Blackout 21422 20 rounds 047700414805 $1.20/rd $23.99 In Stock 6d ago 38m ago BFG Outfitters
Sellier & Bellot Rifle FMJ 300BLKA 20 rounds 754908512447 $0.70/rd $13.99 In Stock 1d ago 38m ago BFG Outfitters
Federal American Eagle Rifle Suppressor AE300BLKSUP2 20 rounds 029465064617 $1.10/rd $21.99 In Stock 6d ago 38m ago BFG Outfitters
Hornady Custom FTX 80881 20 rounds 090255808810 $1.35/rd $26.99 In Stock 6d ago 38m ago BFG Outfitters
Winchester Repeating Arms Deer Season XP Extreme Point X300BLKDS 20 rounds 020892222670 $0.90/rd $17.99 In Stock 12d ago 38m ago BFG Outfitters
Sierra A462510 20 rounds 612710135424 $1.25/rd $24.99 In Stock 6d ago 38m ago BFG Outfitters
Sig Sauer Match Grade OTM E300A1-20 798681514489 $1.20/rd $23.99 In Stock 6d ago 38m ago BFG Outfitters
Winchester Repeating Arms WINCHESTER SILVERTIP 300 BLACKOUT 20 rounds 020892229891 $1.55/rd $30.99 In Stock 6d ago 38m ago BFG Outfitters
Remington Ammunition 26854 20 rounds 047700486406 $1.05/rd $20.99 In Stock 6d ago 38m ago BFG Outfitters
Remington Ammunition 26855 50 rounds 047700486505 $1.00/rd $49.99 In Stock 6d ago 38m ago BFG Outfitters
Hornady Black V-Max 80873 20 rounds 090255808735 $1.20/rd $23.99 In Stock 6d ago 38m ago BFG Outfitters
Fiocchi Extrema Rifle 300BLKHA 25 rounds 762344711188 $0.92/rd $22.99 In Stock 6d ago 38m ago BFG Outfitters
Sig Sauer Elite Hunting OTM E300H1-20 798681552979 $1.30/rd $25.99 In Stock 6d ago 38m ago BFG Outfitters
NOVX Pentagon 300BLK125CP-20 850022779305 $1.80/rd $35.99 In Stock 6d ago 38m ago BFG Outfitters
Barnes Bullets BAR 32004 716876120307 $1.40/rd $27.99 In Stock 81d ago 38m ago BFG Outfitters
Liberty Ammunition LA-HA-C-300-044 20 rounds 019962272134 $2.44/rd $48.90 In Stock 116d ago 38m ago BFG Outfitters
Sierra SIERRA OTDMST 300BLK 115GR HP 20/200 092763600214 $1.15/rd $22.99 In Stock 6d ago 38m ago BFG Outfitters
Nosler Varmageddon Varmint 40127 20 rounds 054041401272 $1.40/rd $27.99 In Stock 6d ago 38m ago BFG Outfitters
Wilson Combat LA300BLK115CC 20 rounds 810025508494 $2.20/rd $43.99 In Stock 6d ago 38m ago BFG Outfitters
Barnes Bullets Subsonic 32134 20 rounds 716876300228 $1.55/rd $30.99 In Stock 6d ago 38m ago BFG Outfitters
NOVX NOVX 300BLK110CE20 859959007864 $1.55/rd $30.99 In Stock 6d ago 38m ago BFG Outfitters
Liberty Ammunition LAOW300962500 20 rounds 691835874210 $1.80/rd $35.99 In Stock 6d ago 38m ago BFG Outfitters
Nosler Match Grade Custom Competition 51275 20 rounds 054041512756 $1.55/rd $30.99 In Stock 38m ago 38m ago BFG Outfitters
Fiocchi Shooting Dynamics Rifle 300BLKC 50 rounds 762344711010 $0.74/rd $36.99 In Stock 6d ago 38m ago BFG Outfitters
Sellier & Bellot S&B 300 AAC 110GR TXRG BLUE 20RD 50BX/CS 754908512720 $1.00/rd $19.99 In Stock 6d ago 38m ago BFG Outfitters

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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