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 USA300B147 300 BLK USA TARGET 147 FMJOT 20 020892231030 $0.96/rd $19.18 In Stock 3d ago 22m ago Firearms Depot
Armscor Precision .300 BLK Ammo 147 Grain FMJ 100rds 4806015504467 $0.96/rd $95.93 In Stock 4d ago 24m ago Cheaper Than Dirt
Ammo Incorporated 300B150FMJB200 Signature 300 Blackout 150 gr Full Metal Jacket (FMJ) 200 Rd Box 818778022571 $0.96/rd $191.73 In Stock 27d ago 8m ago GunStuff TV
PPU PP300BH Standard Rifle 300 Blackout 125 gr Hollow Point Boat Tail (HPBT) 20 Bx/ 50 Cs $0.96/rd $19.20 In Stock 4d ago 19m ago Ammo-Planet
Fiocchi Extrema Rifle 300BLKHA 25 rounds 762344711188 $0.96/rd $23.99 In Stock 13d ago 4m ago DeeseFirearms.com
Fiocchi Extrema Rifle 300BLKHA 25 rounds 762344711188 $0.96/rd $23.99 In Stock 3d ago 14m ago Huligan Arms
Fiocchi Shooting Dynamics Rifle 300BLKC 50 rounds 762344711010 $0.96/rd $47.99 In Stock 15d ago 14m ago Civilian Arms
NOVX AMMO 300BLK 110GR CE 20/10 $0.96/rd $19.25 In Stock 17d ago 1h ago Gman Sport
Fiocchi Extrema Subsonic Rifle Ammo Brass .300 AAC Blackout 220 Grain 25-Rounds BTHP 762344711690 $0.96/rd $24.09 In Stock 9d ago 10m ago GrabAGun.com
Winchester Ammo USA 300 Blackout 125 Grain FMJ 20 Rounds [USA300BLK] 020892224568 $0.96/rd $19.29 In Stock 10m ago 10m ago Ammo Freedom
Fiocchi Shooting Dynamics 300 AAC Blackout 150gr, Full Metal Jacket, Boattail, 50rd Box 762344711010 $0.97/rd $48.29 In Stock 63d ago 19m ago Impact Guns
AMMOINC 300B150FMJ-B200 300BO 150 FMJ 200/6 $0.97/rd $193.16 In Stock 19h ago 1h ago Gman Sport
Ammo Inc .300 Blackout Ammo 150 Grain FMJ 20 Rounds 818778021826 $0.97/rd $19.35 In Stock 11d ago 24m ago Cheaper Than Dirt
FIO 300BLKHA 300BO 125 SST 25/20 $0.97/rd $24.19 In Stock 13d ago 26m ago Gun Buyer
Sig Sauer Ammo Elite 300 Blackout 125 Grain FMJ 20 Rounds [E300B1-20] 798681619634 $0.97/rd $19.39 In Stock 10m ago 10m ago Ammo Freedom
HSM AMMO .300AAC BLACKOUT 110GR. HORNADY V-MAX 20-PACK 20.0000 rounds 837306006791 $0.97/rd $19.46 In Stock 27d ago 8m ago GunStuff TV
AMMOINC 300B150FMJ-B200 300BO 150 FMJ 200/6 $0.97/rd $194.56 In Stock 50d ago 4m ago Guns 2 Ammo
Winchester Ammo USA300BLKX USA 300 Blackout 200 gr SUBSONIC Open Tip Range 20 Bx/ 10 Cs $0.97/rd $19.48 In Stock 80d ago 24m ago BattleHawk Armory
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs $0.98/rd $19.50 In Stock 11d ago 26m ago Gun Zone Deals
Federal American Eagle 300 AAC Blackout Ammo 150 Grain Full Metal Jacket Boat Tail Box of 20 - brass case 604544617009 $0.98/rd $19.50 In Stock 55d ago 55m ago Target Sports USA
300 AAC Blackout - 125 Grain HPBT - Prvi Partizan - 20 Rounds $0.98/rd $19.50 81 24d ago 5m ago Lucky Gunner
200 Round Case - 300 Blackout 147 Grain FMJ Winchester Target Ammo - USA300B147 $0.98/rd $194.90 8 99d ago 32m ago SGAmmo
200 Round Case - 300 Blackout 125 Grain Open Tip Range Ammo by Winchester - USA300BLK $0.98/rd $194.90 11 99d ago 32m ago SGAmmo
Winchester USA Ready 300 AAC Blackout Ammo 125 Grain Full Metal Jacket Open Tip - 200 Rounds - Free Shipping! 020892226562 $0.98/rd $195.00 In Stock 2d ago 2h ago Bereli
Federal American Eagle 300 AAC Blackout Ammo 150 Grain Full Metal Jacket Boat Tail Case of 500 (25 Boxes of 20) - Free Shipping - brass case 604544617009 $0.98/rd $487.50 In Stock 55d ago 55m ago Target Sports USA
Fiocchi Ammo Extrema 300 Blackout 125 Grain SST 25 Rounds [300BLKHA] 762344711188 $0.98/rd $24.39 In Stock 10m ago 10m ago Ammo Freedom
Winchester Ammo USA300BLK USA 300 Blackout 125 gr Open Tip Range 20 Bx/ 10 Cs $0.98/rd $19.55 In Stock 105d ago 19m ago Ammo-Planet
WINCHESTER 300 Blk 125Gr USA Open Tip Range 20rd 020892224568 $0.98/rd $19.55 In Stock 89d ago 31m ago KYGUNCO
Sellier & Bellot 300BLKB Rifle 300 AAC Blackout 147 GR Full Metal Jacket - 20rd Box $0.98/rd $19.58 In Stock 4d ago 53m ago Classic Firearms
HSM Ammo .300Aac Blackout 110gr. Hornady V-Max 20-Pack $0.98/rd $19.58 In Stock 31d ago 15m ago Foundry Outdoors
Fiocchi 300BLKMB Extrema 300 Blackout 220 gr Sierra MatchKing Subsonic Boat-Tail Hollow Point (BTHP) 25 Bx/ 20 Cs $0.98/rd $24.47 In Stock 2d ago 17m ago Locked Loaded
FIOCCHI SHOOTING DYNAMICS .300 aac blackout 150 grain full metal jacket boat tail (fmjbt) 50 rounds 762344711010 $0.98/rd $48.99 In Stock 2d ago 21m ago Guns.com
Fiocchi Shooting Dynamics Rifle 300BLKC 50 rounds 762344711010 $0.98/rd $48.99 In Stock 13d ago 3m ago AmmoGuy.net
Sig Sauer E300B120 Elite Performance 300 Blackout 125 gr Full Metal Jacket (FMJ) 20 Bx/ 25 Cs $0.98/rd $19.63 In Stock 4d ago 19m ago Ammo-Planet
SIG SAUER 300 Blk 125Gr Elite Ball FMJ 20rd Ammo 798681619634 $0.98/rd $19.63 In Stock 4d ago 1h ago KYGUNCO
Fiocchi 300BLKMB Extrema 300 Blackout 220 gr Sierra MatchKing Boat-Tail Hollow Point (BTHP) 25 Bx/ 20 Cs $0.98/rd $24.60 In Stock 2d ago 24m ago BattleHawk Armory
Ammo Inc. Signature Brass .300 AAC Blackout 150-Grain 200-Rounds FMJ 818778022571 $0.98/rd $196.99 In Stock 16d ago 10m ago GrabAGun.com
Fiocchi 300BLKHA Extrema 300 Blackout 125 gr SST 25 Bx/ 20 Cs $0.99/rd $24.67 In Stock 13d ago 19m ago Ammo-Planet
FIOCCHI 300 AAC Blackout SST 125Gr 25rd 762344711188 $0.99/rd $24.67 In Stock 13d ago 1h ago KYGUNCO
Ammo Incorporated , Ammoinc 300b110vmx-b200 300bo 110 Vmax 200/6 818778022564 $0.99/rd $197.64 In Stock 3d ago 22m ago Firearms Depot
Federal 300BLKB Power-Shok 300 Blackout 150 gr Soft Point (SP) 20 Box $0.99/rd $19.88 In Stock 87d ago 24m ago BattleHawk Armory
Prvi Partizan .300 AAC Blackout Ammunition 20 Rounds FMJ 125 Grains 8605003812425 $1.00/rd $19.89 In Stock 1d ago 24m ago Cheaper Than Dirt
Prvi Partizan PPU .300 AAC Blackout Ammunition 125 Grain HPBT 2198fps 20 rounds 8605003812432 $1.00/rd $19.89 In Stock 1d ago 24m ago Cheaper Than Dirt
Armscor USA .300 AAC Blackout Ammunition 147 Grain FMJ 20 rounds 812285021089 $1.00/rd $19.89 In Stock 284d ago 24m ago Cheaper Than Dirt
20 Round Box - 300 Blackout 147 Grain FMJ Winchester Target Ammo - USA300B147 $1.00/rd $19.95 137 99d ago 32m ago SGAmmo
20 Round Box - 300 Blackout 125 Grain Open Tip Range Ammo by Winchester - USA300BLK $1.00/rd $19.95 50 99d ago 32m ago SGAmmo
Winchester Ammo SUP300BLK Super Suppressed 300 Blackout 200 gr Open Tip Range 20 Bx/ 10 Cs $1.00/rd $19.95 In Stock 2h ago 17m ago Locked Loaded
20 Round Box - 300 Blackout 220 Grain TMC Ammo Incorporated Stelth Subsonic Ammo - 300B220TMC-STL $1.00/rd $19.95 136 5d ago 32m ago SGAmmo
Barnaul Ammo 300 BLACKOUT 145GR FMJ STEEL CASE AMMO - 20 ROUND BOX 4607094863717 $1.00/rd $19.95 In Stock 60d ago 28m ago Texas Tactical Gear
20 Round Box - 300 Blackout 150 Grain FMJ Federal American Eagle Ammo - AE300BLK1 $1.00/rd $19.95 32 12d ago 32m ago SGAmmo

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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