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
300 AAC Blackout - 150 Grain FMJ - Fiocchi - 50 Rounds 762344711010 $0.90/rd $45.00 157 161d ago 45m ago Lucky Gunner
Winchester 300 AAC Blackout Ammunition Super Suppressed SUP300BLK 200 Grain Full Metal Jacket Open Tip Subsonic Case of 200 Rounds $0.90/rd $179.90 In Stock 28d ago 24m ago Outdoor Limited
Ammo Inc. stelTH 300 AAC Blackout Ammo - 200 Rounds of 220 Grain... $0.90/rd $179.99 In Stock 5d ago 48m ago Ammo.com
Hornady 300 AAC Blackout Ammunition Frontier FR400 125 Grain Full Metal Jacket CASE 200 Rounds $0.90/rd $179.99 In Stock 170d ago 24m ago Outdoor Limited
300 AAC Blackout 200gr FMJ Sellier & Bellot Ammo Brick (200 rds) $0.90/rd $179.99 In Stock 23h ago 42s ago The Armory
Winchester USA 300 AAC Blackout Ammo - 200 Rounds of 147 Grain FMJ... $0.90/rd $179.99 In Stock 5d ago 48m ago Ammo.com
300 AAC Blackout - 220 Grain TMJ - Ammo Inc. stelTH - 200 Rounds 0214202316201 $0.90/rd $180.00 143 16d ago 45m ago Lucky Gunner
300 AAC Blackout - 147 Grain FMJ - Winchester USA - 200 Rounds $0.90/rd $180.00 9 80d ago 45m ago Lucky Gunner
Sellier & Bellot 300 AAC Blackout Ammunition SB300BLKB 147 Grain Full Metal Jacket Case of 1000 Rounds $0.90/rd $899.50 In Stock 171d ago 24m ago Outdoor Limited
Ammo Inc. Stelth Subsonic, .300 AAC Blackout, TMC, 220 Grain, 20 Rounds $0.90/rd $18.04 In Stock 6d ago 41m ago Sportsman's Guide
Winchester Ammo USA300BLK USA 300 Blackout 125 gr Open Tip Range 20 Round Box 020892224568 $0.90/rd $18.04 In Stock 1d ago 1h ago Cape Gun Works
Sellier & Bellot 300BLKB Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 50 Cs - Unit: Case 1000 rounds 754908512454 $0.90/rd $902.03 In Stock 13d ago 28m ago White Birch Armory
Ammo Inc Signature Match .300 Blackout Rifle Ammo - 155 Grain | BTHP | 20rd Box 818778023790 $0.90/rd $18.08 In Stock 23d ago 45m ago Skogen’s Gun Supply
REM 26855 L300AAC2V UMC 300BO VP 150 FMJ 50/8 047700486505 $0.90/rd $45.19 In Stock 8d ago 56s ago Acute Firearms
Winchester .300 AAC BLACKOUT, 200gr, OT - 20 Rounds [MPN: USA300BLKX] 020892224582 $0.91/rd $18.13 In Stock 4d ago 22m ago Firearms Depot
Winchester Ammo USA300BLKX USA 300 Blackout 200 gr Open Tip Range 20 Bx/ 10 Cs 020892224582 $0.91/rd $18.14 In Stock 4d ago 45m ago Skogen’s Gun Supply
Fiocchi 300BLKHA Extrema 300 AAC Blackout/Whisper (7.62X35mm) 125 GR SST 25 Bx/ 20 Cs 762344711188 $0.91/rd $22.67 In Stock 62d ago 40m ago Foundry Outdoors
Sig Sauer Elite Performance .300 AAC BLACKOUT, 125gr, FMJ - 20 Rounds [MPN: E300B120] 798681619634 $0.91/rd $18.16 In Stock 7d ago 22m ago Firearms Depot
AMMO, 300BLK, 125GR, ELITE BALL, FMJ, BOX/20 798681619634 $0.91/rd $18.18 In Stock 7d ago 45m ago Skogen’s Gun Supply
FIOCCHI 300BLK 150GR FMJBT 50/500 762344711010 $0.91/rd $45.72 In Stock 47d ago 32m ago The Armories
Winchester Ammo USA 300 BLK 200 Gr SUBSONIC Open Tip Range 20rds 020892224582 $0.92/rd $18.29 In Stock 4d ago 26m ago BattleHawk Armory
Fiocchi 300BLKHA Hyperformance 300 Blackout 125 gr Super Shock Tip 25 Per Box/ 20 Cs 762344711188 $0.92/rd $22.88 In Stock 11d ago 58m ago Hinterland Outfitters
Winchester USA Ready 300 AAC Blackout Ammo 125 Grain Full Metal Jacket Open Tip 200 Rounds 020892226562 $0.92/rd $183.00 In Stock 119d ago 2h ago BH Ammo
240 Round Can - 300 AAC Blackout 124 Grain FMJ Ammo By Sellier Bellot - SB300BLKA - Packed in Mini Ammo Canister $0.92/rd $219.50 4 22d ago 58m ago SGAmmo
Frontier Cartridge FR400 Rifle 300 Blackout 125 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs 090255713978 $0.92/rd $18.32 In Stock 43d ago 45m ago Skogen’s Gun Supply
Sellier & Bellot 300BLKA Rifle 300 Blackout 124 gr Full Metal Jacket 20 Bx/ 50 Cs 754908512447 $0.92/rd $18.38 In Stock 2d ago 56s 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 15d ago 56s ago Acute Firearms
Fiocchi Extrema Rifle 300BLKHA 25 rounds 762344711188 $0.92/rd $22.99 In Stock 6d ago 35m ago BFG Outfitters
Fiocchi Extrema Rifle 300BLKHA 25 rounds 762344711188 $0.92/rd $22.99 In Stock 38d ago 1h ago Hot Ammo
Fiocchi 300BLKHA Extrema 300 Blackout 125 gr SST 25 Bx/ 20 Cs 762344711188 $0.92/rd $22.99 In Stock 62d ago 2m ago GunZoneDeals
Hornady 300BLK 110GR CUST CX 20RD 25 rounds 090255720006 $0.92/rd $22.99 In Stock 20d ago 47m ago United Patriot Supply
Remington Ammunition 26855 50 rounds 047700486505 $0.92/rd $45.99 In Stock 8d ago 7m ago Elite FIrearms Online
Federal AE300BLK1 American Eagle 300 Blackout 150 gr Full Metal Jacket Boat Tail (FMJBT) 20 Bx/ 25 Cs 604544617009 $0.92/rd $18.45 In Stock 28d ago 27m ago Locked Loaded
Fiocchi Ammo Extrema Rifle Ammunition .300 BLK 125gr SST 20rd Box 762344711188 $0.92/rd $23.08 In Stock 15d ago 44m ago Tombstone Tactical
Federal AE300BLK1 American Eagle 300 Blackout 150 gr Full Metal Jacket Boat Tail (FMJBT) 20 Bx/ 25 Cs 604544617009 $0.92/rd $18.49 In Stock 40d ago 45m ago Skogen’s Gun Supply
Federal Fusion MSR Medium Game F300BMSR2 20 rounds 604544624113 $0.92/rd $18.49 In Stock 6d ago 35m ago BFG Outfitters
Ammo Inc. 300 AAC Blackout Ammo - 200 Rounds of 110 Grain V-MAX... $0.92/rd $184.99 In Stock 5d ago 48m ago Ammo.com
Winchester - Open Tip - 200 Grain 300 AAC Blackout Ammo - 200 Rounds $0.92/rd $184.99 In Stock 59d ago 58m ago CheapAmmo.com
Winchester Subsonic 300 AAC Blackout Ammo - 200 Rounds of 200... $0.92/rd $184.99 In Stock 5d ago 48m ago Ammo.com
300 AAC Blackout - 110 Grain V-MAX - Ammo Inc. - 200 Rounds $0.92/rd $185.00 108 51d ago 45m ago Lucky Gunner
300 AAC Blackout - 200 Grain Open Tip - Winchester Subsonic - 200 Rounds $0.92/rd $185.00 143 4h ago 45m ago Lucky Gunner
Federal AE300BLK1 American Eagle 300 Blackout 150 gr Full Metal Jacket Boat Tail (FMJBT) 20 Bx/ 25 Cs 604544617009 $0.93/rd $18.51 In Stock 14d ago 2h ago Defense Depot
Hornady Frontier .300 AAC Blackout 125gr FMJ 20rd Box 090255713978 $0.93/rd $18.55 In Stock 5d ago 44m ago Tombstone Tactical
Winchester Ammunition .300 BLK 200gr Open Tip - Range Subsonic 20rd Box 020892224582 $0.93/rd $18.56 In Stock 4d ago 44m ago Tombstone Tactical
Frontier 300 Blackout 125gr Fmj 20/2 090255713978 $0.93/rd $18.56 In Stock 13d ago 2m ago Tactical Surplus USA
PMC Bronze 44 S&W Special 180gr JHP 25rds $0.93/rd $23.19 In Stock 8h ago 19m ago DEGUNS.NET
Winchester USA Ready 300 AAC Blackout Ammo 125 Grain Full Metal Jacket Open Tip 100 Rounds 020892226562 $0.93/rd $93.00 In Stock 119d ago 2h ago BH Ammo
DoubleTap Ammunition Match 300 AAC Blackout 147 Grain Full Metal Jacket Boat Tail 20 Round Box $0.93/rd $18.63 In Stock 14m ago 115d ago Wholesale Hunter
Winchester Ammo X300BLKDS Deer Season XP 300 Blackout 150 gr Extreme Point 20 Bx/ 10 Cs 020892222670 $0.93/rd $18.63 In Stock 7d ago 52m ago Dack Outdoors
Federal AE300BLK1 American Eagle 300 Blackout 150 gr Full Metal Jacket Boat Tail (FMJBT) 20 Bx/ 25 Cs 604544617009 $0.93/rd $18.64 In Stock 13d ago 26m ago BattleHawk Armory

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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