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
Frontier Cartridge HRN 300BLK 125GR FMJ FRONTIER 20 rounds 090255713978 $0.85/rd $16.99 In Stock 113d ago 60m ago Charter Tactical
AMMO INCORPORATED STELTH 300 BLACKOUT 220GR TMC 20/200 818778022175 $0.85/rd $16.99 In Stock 113d ago 60m ago Charter Tactical
Ammo Inc Signature Match .300 Blackout Rifle Ammo - 155 Grain | BTHP | 20rd Box 818778023790 $0.85/rd $16.99 In Stock 2d ago 26m ago GunZoneDeals
PPU Standard Rifle FMJ PP300BF 20 rounds 8605003812425 $0.85/rd $16.99 In Stock 42d ago 54m ago BFG Outfitters
PPU Standard Rifle FMJ PP300BF 20 rounds 8605003812425 $0.85/rd $16.99 In Stock 17d ago 60m ago Charter Tactical
Armscor 300BO FMJ FAC300AAC1N 20 rounds 812285021089 $0.85/rd $16.99 In Stock 10d ago 30m ago Just Holster It Firearms and Training Center
Winchester Repeating Arms WIN USA 300BLK 125GR OT 20/200 020892224568 $0.85/rd $16.99 In Stock 15d ago 46m ago United Patriot Supply
STELTH 300 BLACKOUT 220GR TMC 20/200 818778022175 $0.85/rd $17.00 In Stock 5d ago 20m ago USA Gun Stores
Ammo Inc 300B110VMXA20 Signature 300 Blackout 110 gr Hornady V-Max 20 Per Box/ 10 Case 20 Gauge rounds 818778022656 $0.85/rd $17.00 In Stock 5d ago 20m ago USA Gun Stores
Precision One 300 Blackout Ammunition PONE1449 150 Grain Copper Plated Full Metal Jacket CASE 200 Rounds $0.85/rd $169.90 In Stock 95d ago 54m ago Outdoor Limited
Frontier Cartridge Military Grade 300 AAC Blackout Ammo 125 Grain Hornady Full Metal Jacket Case of 200 (10 Boxes of 20) - FREE SHIPPING - brass case 090255713978 $0.85/rd $169.90 In Stock 12d ago 47m ago Target Sports USA
Winchester USA 300 AAC Blackout Ammo - 200 Rounds of 125 Grain... $0.85/rd $169.99 In Stock 70d ago 31m ago Ammo.com
Frontier | 300 BLK | 125gr | FMJ - 200rd Case 090255713978 $0.85/rd $169.99 In Stock 129d ago 4m ago Recoil Gunworks
300 AAC Blackout - 125 Grain Open Tip - Winchester USA - 200 Rounds $0.85/rd $170.00 153 78d ago 5m ago Lucky Gunner
Sellier & Bellot 300 AAC Blackout Ammunition SB300BLKA 124 Grain Full Metal Jacket CASE 1000 rounds $0.85/rd $849.50 In Stock 278d ago 54m ago Outdoor Limited
Fiocchi 300BLKC Training Dynamics 300 Blackout 150 gr Full Metal Jacket Boat Tail (FMJBT) 50 Bx/ 10 Cs 762344711010 $0.85/rd $42.55 In Stock 2d ago 18m ago Acute Firearms
Winchester Ammunition USA, 300 Blackout, 200 Grain, Open Tip, Subsonic, 20 Round Box USA300BLKX 020892224582 $0.85/rd $17.05 In Stock 4d ago 43m ago Foundry Outdoors
Frontier Cartridge FR400 Rifle 300 Blackout 125 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs 090255713978 $0.85/rd $17.07 In Stock 3d ago 6m ago Locked Loaded
Sellier & Bellot .300 Blackout, 124gr, FMJ, 20rd Box 754908512447 $0.85/rd $17.08 In Stock 13d ago 21m ago Impact Guns
WIN USA 300BLK 147GR FMJ 20/10 020892231030 $0.85/rd $17.08 In Stock 3d ago 13m ago SHTF Tactical
Fiocchi Extreme 300 Blackout 150 Grain FMJ 50 Round Box 300BLKC $0.85/rd $42.70 In Stock 10d ago 2m ago Gun Buyer
Factory 2nds: Stryker 300 AAC Blackout 150 gr Polymer Tip - 400 ct. $0.86/rd $342.00 In Stock 43d ago 33s ago The American Marksman
PPU PP300BF Standard Rifle 300 AAC Blackout/Whisper (7.62x35mm) 125 GR Flat Point Jacketed 20 Bx/ 50 Cs 8605003812425 $0.86/rd $17.11 In Stock 4d ago 43m ago Foundry Outdoors
Prvi Partizan Rifle, 300 Blackout, 125 Grain, Full Metal Jacket, 20 Round Box PP300BF 8605003812425 $0.86/rd $17.11 In Stock 4d ago 43m ago Foundry Outdoors
Frontier Cartridge FR400 Rifle 300 Blackout 125 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs 090255713978 $0.86/rd $17.12 In Stock 26d ago 2h ago Defense Depot
Fiocchi 300BLKHA Extrema 300 Blackout 125 gr SST 25 Bx/ 20 Cs 762344711188 $0.86/rd $21.40 In Stock 4d ago 56m ago Dack Outdoors
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs 812285021089 $0.86/rd $17.13 In Stock 2d ago 18m ago Acute Firearms
Ammo Inc. Stelth Subsonic, .300 AAC Blackout, TMC, 220 Grain, 20 Rounds $0.86/rd $17.14 In Stock 35d ago 11m ago Sportsman's Guide
PPU PP300BF Standard Rifle 300 Blackout 125 gr Full Metal Jacket (FMJ) 20 Bx/ 50 Cs 8605003812425 $0.86/rd $17.18 In Stock 3d ago 38m ago Tombstone Tactical
Ammo Inc Signature .300 AAC BLACKOUT, 110gr, V-Max - 20 Rounds [MPN: 300B110VMXA20] 818778022656 $0.86/rd $17.18 In Stock 3d ago 20m ago Firearms Depot
Ammo Inc. Signature Brass .300 Blackout 110 Grain 20-Rounds VMAX 818778022656 $0.86/rd $17.19 In Stock 2d ago 7m ago GrabAGun.com
Aguila .300 AAC Blackout/Whisper 150Gr 50Rds 640420003313 $0.86/rd $42.99 In Stock 2d ago 7m ago GrabAGun.com
Fiocchi Shooting Dynamics Rifle 300BLKC 50 rounds 762344711010 $0.86/rd $42.99 In Stock 19d ago 15m ago Get Loaded PA
Fiocchi Shooting Dynamics Rifle 300BLKC 50 rounds 762344711010 $0.86/rd $42.99 In Stock 85d ago 2h ago Defensive Ballistics
Armscor Precision 300 Blackout 147 gr. FMJ 100 rnd/VALUE PACK 4806015504467 $0.86/rd $85.99 In Stock 2d ago 57m ago Ammo Supply Warehouse
Winchester .300 Blackout 200 grain Subsonic Open Tip (20 rd box) $0.86/rd $17.25 In Stock 2h ago 51s ago Rivertown Munitions
Frontier Cartridge FR400 Rifle 300 Blackout 125 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs 090255713978 $0.86/rd $17.26 In Stock 4d ago 56m ago Dack Outdoors
Win Usa 300blk 200gr Ot 20/200 020892224582 $0.86/rd $17.28 In Stock 4d ago 1h ago Tactical Surplus USA
Federal 300 Blackout 150 gr FMJ Boat Tail American Eagle 20/Box $0.86/rd $17.29 In Stock 1d ago 4m ago Sportsmans Outdoors Superstore
Winchester Ammo USA300B147 USA 300 Blackout 147 gr 1920 fps Full Metal Jacket Open Tip (FMJOT) 20 Bx/10 Cs 020892231030 $0.86/rd $17.29 In Stock 11d ago 1h ago Ammo Joy
FEDERAL AMMUNITION 300 Blackout 150 gr FMJ Boat Tail American Eagle 20/Box 604544617009 $0.86/rd $17.29 In Stock 1d ago 30m ago Sportsmans Outdoors Superstore
Winchester Ammo SUP300BLK Super Suppressed 300 Blackout 200 gr Open Tip Range 20 Bx/ 10 Cs 020892224483 $0.86/rd $17.30 In Stock 1d ago 25m ago Skogen’s Gun Supply
Ppu 300blk Fmj 125gr 20/1000 8605003812425 $0.87/rd $17.33 In Stock 4d ago 1h ago Tactical Surplus USA
Winchester Ammunition .300 BLK 200gr Open Tip - Range Subsonic 20rd Box 020892224582 $0.87/rd $17.34 In Stock 3d ago 38m ago Tombstone Tactical
Ppu Ammo .300 Aac Blackout 125Gr. Fmj 20Rd Box Pp300Bf $0.87/rd $17.35 In Stock 4d ago 43m ago Foundry Outdoors
Winchester Ammo USA300B147 USA Target 300 Blackout 147 gr Full Metal Jacket Open Tip (FMJOT) 20 Bx/ 10 Cs 020892231030 $0.87/rd $17.39 In Stock 3d ago 20m ago White Birch Armory
Armscor FAC300AAC3N Rifle 300 Blackout 220 gr Boat Tail Hollow Point (BTHP) 20 Bx/ 10 Cs 812285022048 $0.87/rd $17.41 In Stock 3d ago 6m ago Locked Loaded
Ammo, Inc. .300 Blackout 110 grain V-Max Brass Cased Centerfire Rifle Ammo, 20 rd Box 818778022656 $0.87/rd $17.42 In Stock 3d ago 38m ago Tombstone Tactical
Winchester USA 300 Blackout Ammo 200 grain Open Tip Case of 240 Rounds USA300BXVP $0.87/rd $209.00 In Stock 59d ago 43m ago Gunprime
AMMO INC AMO STELTH 300 BLACKOUT 220 GR TMC 20RD BX 818778022175 $0.87/rd $17.45 In Stock 2d ago 25m ago Skogen’s Gun Supply

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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