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 - Federal American Eagle - 500 Rounds 50004544617002 $0.94/rd $470.00 62 20d ago 8m ago Lucky Gunner
Fiocchi 300BLKHA Extrema 300 Blackout 125 gr SST 300BLK-Spec FB 25 Bx/ 20 Cs 762344711188 $0.94/rd $23.52 In Stock 29d ago 25m ago Guns 2 Ammo
PPU PP300BH Standard Rifle 300 Blackout 125 gr Hollow Point Boat Tail (HPBT) 20 Round Box 8605003812432 $0.94/rd $18.85 In Stock 3h ago 33m ago Cape Gun Works
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 24m ago Acute Firearms
Hornady 91224 American Gunner 10mm 155 gr Handgun Ammo $0.94/rd $18.89 In Stock 18h ago 41m ago DEGUNS.NET
Fiocchi Hyperformance 300 Blackout 125 Gr Super Shock Tip 25 Rounds Per Box 762344711188 $0.94/rd $23.62 In Stock 16d ago 14m ago Beebe Family Arms & Munitions
20 Round Box - 300 Blackout 168 Grain Boat Tail Hollow Point Ammo By Ammo Incorporated - 300B168BTHP-A20 $0.95/rd $18.95 118 153d ago 21m ago SGAmmo
20 Round Box - 300 Blackout 155 Grain Boat Tail Hollow Point Ammo By Ammo Incorporated - 300155BTHP-A20 $0.95/rd $18.95 130 153d ago 21m ago SGAmmo
WIN X300BLK 300BO 150PSP PWRPNT 20/10 020892231924 $0.95/rd $18.97 In Stock 41d ago 8m ago Skogen’s Gun Supply
PPU Standard Rifle FMJ PP300BF 20 rounds 8605003812425 $0.95/rd $18.98 In Stock 616d ago 1h ago FireLine Armory
Fiocchi .300 Blackout 125Gr. Sst 25-Pack 300Blkha 762344711188 $0.95/rd $23.73 In Stock 36d ago 4m ago Foundry Outdoors
USA, 300 Blackout, 147 Grain, Full Metal Jacket, 20 Round Box 020892231030 $0.95/rd $18.99 In Stock 93d ago 56m ago The Armories
Sierra SIERRA OTDMST 300BLK 115GR HP 20/200 092763600214 $0.95/rd $18.99 In Stock 6d ago 38m ago Charter Tactical
Federal American Eagle FMJBT AE300BLK1 20 rounds 604544617009 $0.95/rd $18.99 In Stock 6d ago 58m ago BFG Outfitters
Ammo, Inc. Signature 300 Blackout 168 Grain BTHP Brass Case Rifle Ammo, 20 Rounds, 300B168BTHP-A20 818778023608 $0.95/rd $18.99 In Stock 3d ago 1h ago Optics Planet
Frontier Cartridge Military Grade 300 AAC Blackout Ammo 125 Grain Hornady Full Metal Jacket Box of 20 - brass case 090255713978 $0.95/rd $18.99 In Stock 154d ago 27m ago Target Sports USA
Winchester Repeating Arms USA300BLKX 20 rounds 020892224582 $0.95/rd $18.99 In Stock 23d ago 9m ago Griswald Defense
Ammo, Inc. .300 Blackout 110 Grain V-Max Brass Cased Centerfire Rifle Ammo, 20 Round, Box, 300B110VMX-A20 818778022656 $0.95/rd $18.99 In Stock 3d ago 1h ago Optics Planet
Sellier & Bellot 300BLKA Rifle 300 Blackout 124 gr Full Metal Jacket 20 Bx/ 50 Cs 754908512447 $0.95/rd $18.99 In Stock 1d ago 55m ago Gulf Coast Gun & Outdoors
Winchester Repeating Arms USA300BLKX 20 rounds 020892224582 $0.95/rd $18.99 In Stock 22d ago 3m ago Miami Police Depot
Prvi PPU 300 AAC Blackout Ammunition PP300BH 125 Grain Hollow Point Boat Tail 20 Rounds 8605003812432 $0.95/rd $18.99 In Stock 171d ago 48m ago Outdoor Limited
300 AAC Blackout 200gr FMJ Sellier & Bellot Ammo Box (20 rds) $0.95/rd $18.99 In Stock 21h ago 24m ago The Armory
Sig Sauer SIG E300B120 798681619634 $0.95/rd $18.99 In Stock 7d ago 4m ago Get Loaded PA
AMMO INCORPORATED STELTH 300 BLACKOUT 220GR TMC 20/200 818778022175 $0.95/rd $18.99 In Stock 85d ago 2h ago Elite FIrearms Online
Winchester Ammo RED300 USA Ready 300 Blackout 125 gr Open Tip 20 Bx/ 10 Cs 020892226562 $0.95/rd $18.99 In Stock 48d ago 55m ago Gulf Coast Gun & Outdoors
Hornady 300 AAC Blackout Ammunition Frontier FR400 125 Grain Full Metal Jacket 20 Rounds 090255713978 $0.95/rd $18.99 In Stock 171d ago 48m ago Outdoor Limited
.300 Blackout 125gr Open Tip Winchester - 20 Rounds 20 rounds $0.95/rd $18.99 In Stock 29d ago 16m ago Canoe Club USA
Winchester Repeating Arms USA300BLK 20 rounds 020892224568 $0.95/rd $18.99 In Stock 6d ago 23m ago Sergeant's Arms
AMMO INCORPORATED STELTH 300 BLACKOUT 220GR TMC 20/200 818778022175 $0.95/rd $18.99 In Stock 85d ago 9m ago Griswald Defense
AMMO INCORPORATED STELTH 300 BLACKOUT 220GR TMC 20/200 818778022175 $0.95/rd $18.99 In Stock 85d ago 4m ago Get Loaded PA
Frontier Cartridge HRN 300BLK 125GR FMJ FRONTIER 20 rounds 090255713978 $0.95/rd $18.99 In Stock 179d ago 2h ago Elite FIrearms Online
Federal AE300BLK1 American Eagle 300 Blackout 150 gr Full Metal Jacket Boat Tail (FMJBT) 20 Bx/ 25 Cs 604544617009 $0.95/rd $18.99 In Stock 66d ago 25m ago GunZoneDeals
Federal American Eagle FMJBT AE300BLK1 20 rounds 604544617009 $0.95/rd $18.99 In Stock 38d ago 29m ago Hot Ammo
SIG 300 AAC ELITE BALL 125GR 20 rounds 798681619634 $0.95/rd $18.99 In Stock 7d ago 58m ago HD Tactical
Ammo Inc. 300 AAC Blackout Ammo - 20 Rounds of 110 Grain V-MAX... 818778022656 $0.95/rd $18.99 In Stock 6d ago 12m ago Ammo.com
PPU, .300 AAC Blackout, 125 Grains, HPBT, 20 Rounds $0.95/rd $18.99 In Stock 17d ago 9m ago Sportsman's Guide
Sierra SIERRA OTDMST 300BLK 115GR HP 20/200 092763600214 $0.95/rd $18.99 In Stock 8d ago 10m ago United Patriot Supply
Winchester Repeating Arms USA300BLKX 20 rounds 020892224582 $0.95/rd $18.99 In Stock 23d ago 4m ago Get Loaded PA
Sellier & Bellot .300 Blackout Ammunition FMJ 147 Grains 20rd box 754908512454 $0.95/rd $18.99 In Stock 15d ago 7m ago Tombstone Tactical
AMMO INCORPORATED STELTH 300 BLACKOUT 220GR TMC 20/200 818778022175 $0.95/rd $18.99 In Stock 48d ago 3m ago Miami Police Depot
300 AAC Blackout - 147 Grain FMJ - Doubletap Match - 20 Rounds 91037349101 $0.95/rd $19.00 66 179d ago 8m ago Lucky Gunner
300 AAC Blackout - 110 Grain V-MAX - Ammo Inc. - 20 Rounds 818778022656 $0.95/rd $19.00 56 79d ago 8m ago Lucky Gunner
FIOCCHI AMO 300 BLACKOUT 125GR SST 25-RD ( 20 BOXES PER CASE ) 762344711188 $0.95/rd $23.74 In Stock 42d ago 8m ago Skogen’s Gun Supply
Stryker 300 AAC Blackout 150 gr Soft-Point - 50 ct. $0.95/rd $47.50 In Stock 35d ago 30m ago The American Marksman
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 $0.95/rd $189.90 In Stock 154d ago 27m ago Target Sports USA
Federal AE300BLK1 American Eagle 300 AAC Blackout/Whisper (7.62X35mm) 150 GR Full Metal Jacket Boat Tail 20 Bx/ 25 Cs 604544617009 $0.95/rd $19.01 In Stock 66d ago 4m ago Foundry Outdoors
Fiocchi Hyperformance Brass .300 AAC Blackout 125 Grain 25-Rounds SST 762344711188 $0.95/rd $23.79 In Stock 14d ago 32m ago GrabAGun.com
Frontier Cartridge FR400 Rifle 300 Blackout 125 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs 090255713978 $0.95/rd $19.06 In Stock 15d ago 1m ago Huligan Arms
AMMO INC AMO STELTH 300 BLACKOUT 220 GR TMC 20RD BX 818778022175 $0.95/rd $19.07 In Stock 18d ago 48m ago SHTF Tactical
Winchester USA 300 Blackout Ammo 200 grain Open Tip Case of 240 Rounds USA300BXVP $0.95/rd $229.00 In Stock 50d ago 48m ago Gunprime

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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