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
Sig Sauer E300B120 Elite Performance 300 Blackout 125 gr Full Metal Jacket (FMJ) 20 Bx/ 25 Cs $0.90/rd $18.00 In Stock 4d ago 28m ago Guns 2 Ammo
Fiocchi Shooting Dynamics Rifle 300BLKC 50 rounds 762344711010 $0.90/rd $44.99 In Stock 4d ago 17m ago Skunk Bear Tactical
Fiocchi Rifle Shooting Dynamics Rifle Ammunition .300 AAC Blackout 150gr FMJBT 1925 fps 50/ct $0.90/rd $44.99 In Stock 11d ago 13m ago Natchezss
Ammo Inc StelTH 300 Blackout Ammo 220gr Subsonic TMC 200rds $0.90/rd $179.99 In Stock 2d ago 21m ago Palmetto
AMMOINC 300B110VMX-B200 300BO 110 VMAX 200/6 $0.90/rd $179.99 In Stock 5d ago 21m ago Gun Zone Deals
STRYKER: 300 AAC BLACKOUT 220 GR TMJ (SUBSONIC) - 400 CT $0.90/rd $360.00 In Stock 26d ago 28m ago The American Marksman
Winchester USA Ready 300 AAC Blackout Ammo 125 Grain Full Metal Jacket Open Tip - 1000 Rounds - Free Shipping! 020892226562 $0.90/rd $900.00 In Stock 2d ago 54m ago Bereli
Winchester Ammo RED300 USA Ready 300 Blackout 125 gr Open Tip 20 Bx/ 10 Cs $0.90/rd $18.02 In Stock 17d ago 12m ago Locked Loaded
Fiocchi 300BLKHA Extrema 300 Blackout 125 gr SST 300BLK-Spec FB 25 Bx/ 20 Cs $0.90/rd $22.62 In Stock 13d ago 28m ago Guns 2 Ammo
Stelth 300 Blackout 220gr Tmc 20/200 818778022175 $0.91/rd $18.14 In Stock 8d ago 1h ago Tactical Surplus USA
Sig Sauer E300B120 Elite Performance 300 Blackout 125 gr Full Metal Jacket (FMJ) 20rd Box 798681619634 $0.91/rd $18.16 In Stock 11d ago 2m ago GunStuff TV
Winchester USA 300 Blackout Ammo 200 grain Open Tip Box of 60 Rounds USA300BXVP $0.91/rd $54.50 In Stock 45d ago 1h ago Gunprime
Armscor AUA 50446 100 rounds 4806015504467 $0.91/rd $90.99 In Stock 80d ago 48m ago Get Loaded PA
PPU .300 AAC Blackout FMJ 125gr 20 Rounds 8605003812425 $0.91/rd $18.22 In Stock 3d ago 17m ago Firearms Depot
FEDERAL AMERICAN EAGLE 300 BLACKOUT 150GR FMJBT 20 RD AE300BLK1 $0.91/rd $18.22 In Stock 5d ago 24m ago Gun Buyer
Sig Sauer Elite Performance 300 Blackout 125gr FMJ 2145 FPS 20/box 798681619634 Free S/H over $250 $0.91/rd $18.24 In Stock 3d ago 59m ago AE Armory
Fiocchi Hyperformance Brass .300 AAC Blackout 125 Grain 25-Rounds SST 762344711188 $0.91/rd $22.79 In Stock 13d ago 4m ago GrabAGun.com
Winchester Super Suppressed 300 Blackout Ammo 200 grain Open Tip Box of 20 Rounds SUP300BLK $0.91/rd $18.25 In Stock 58d ago 1h ago Gunprime
FEDERAL 300 AAC BLACKOUT POWER-SHOK 150GR - 20RDS $0.91/rd $18.27 In Stock 3d ago 35m ago AB Guns
Fiocchi 300BLKHA Extrema 300 AAC Blackout/Whisper (7.62X35mm) 125 GR SST 25 Bx/ 20 Cs 762344711188 $0.91/rd $22.86 In Stock 9d ago 9m ago Foundry Outdoors
Winchester Ammo USA300BXVP USA Value Pack 300 Blackout 200 gr Open Tip 60 Bx/ 4 Cs $0.92/rd $54.99 In Stock 11d ago 21m ago Gun Zone Deals
AMMOINC 300B150FMJ-B200 300BO 150 FMJ 200/6 $0.92/rd $183.41 In Stock 119d ago 12m ago Locked Loaded
HSM 300 Blackout Ammo 110 grain V-MAX Tipped Case of 500 Rounds Bulk 300BLK-2-N-C $0.92/rd $459.00 In Stock 96d ago 1h ago Gunprime
Federal Ammo American Eagle 300 Blackout 150 Grain FMJBT 20 Rounds [AE300BLK1] 604544617009 $0.92/rd $18.39 In Stock 1h ago 5m ago Ammo Freedom
Fiocchi Extrema Rifle 300BLKHA 25 rounds 762344711188 $0.92/rd $22.99 In Stock 13d ago 29m ago Tin Star Shooting Range
Fiocchi 300BLKC Shooting Dynamics 300 AAC BO FMJBT 150 GR 50 Bx/10 Cs 762344711010 $0.92/rd $45.99 In Stock 9d ago 9m ago Foundry Outdoors
Fiocchi 300 AAC Blackout Ammunition FI300BLKC 150 Grain Full Metal Jacket Boat Tail 50 rounds 762344711010 $0.92/rd $45.99 In Stock 8d ago 29m ago Outdoor Limited
Winchester USA Value Pack Brass .300 AAC Blackout 200-Grain 60-Rounds OT $0.92/rd $55.19 In Stock 6d ago 4m ago GrabAGun.com
Fiocchi 300 AAC Blackout Ammunition FI300BLKC 150 Grain Full Metal Jacket Boat Tail 500 rounds $0.92/rd $459.99 In Stock 8d ago 29m ago Outdoor Limited
Winchester Ammo RED300 USA Ready 300 Blackout 125 gr Open Tip 20 Bx/ 10 Cs $0.92/rd $18.42 In Stock 17d ago 18m ago BattleHawk Armory
AMMOINC 300B110VMX-A20 300BO 110 VMAX 20/10 $0.92/rd $18.48 In Stock 105d ago 13m ago Ammo-Planet
WIN USA 300BLK 147GR FMJ 20/10 $0.92/rd $18.48 In Stock 20h ago 9m ago Gman Sport
Sellier & Bellot 300 BLACKOUT 200gr Subsonic 1060 FPS 20/box 754908512461 Free S/H over $250 $0.92/rd $18.49 In Stock 23d ago 59m ago AE Armory
Winchester USA Brass .300 AAC Blackout 147-Grain 20-Rounds FMJ 020892231030 $0.92/rd $18.49 In Stock 20d ago 4m ago GrabAGun.com
Winchester Super Suppressed 300 AAC Blackout Subsonic 200gr Open Tip Range 1060 FPS 20/box 020892224483 Free S/H over $250 $0.92/rd $18.49 In Stock 23d ago 59m ago AE Armory
AMMOINC 300B150FMJ-B200 300BO 150 FMJ 200/6 $0.92/rd $184.99 In Stock 40d ago 11m ago Dack Outdoors
Winchester Ammo USA300B147 USA Target 300 Blackout 147 gr Full Metal Jacket Open Tip (FMJOT) 20 Round Box 020892231030 $0.93/rd $18.53 In Stock 27d ago 2m ago GunStuff TV
Winchester Ammo RED300 USA Ready 300 Blackout 125 GR 20 Bx/ 10 Cs 020892226562 $0.93/rd $18.54 In Stock 9d ago 9m ago Foundry Outdoors
Ammo Incorporated 300B110VMXB200 Signature 300 Blackout 110 gr V-Max 200 Rd Box 818778022564 $0.93/rd $185.55 In Stock 27d ago 2m ago GunStuff TV
FEDERAL AMMO 300 AAC 150Gr Full Metal Jacket Boat-Tail 20rd 604544617009 $0.93/rd $18.59 In Stock 1d ago 2h ago KYGUNCO
Federal AE300BLK1 American Eagle 300 Blackout 150 gr Full Metal Jacket Boat Tail (FMJBT) 20 Bx/ 25 Cs $0.93/rd $18.59 In Stock 23d ago 13m ago Ammo-Planet
AMMOINC 300B150FMJ-B200 300BO 150 FMJ 200/6 $0.93/rd $185.99 In Stock 5d ago 21m ago Gun Zone Deals
Winchester Ammo USA300BLK USA 300 Blackout 125 gr Open Tip Range - 20rds - VETERAN OWNED BUSINESS 020892224568 $0.93/rd $18.61 In Stock 25d ago 56m ago Madison Guns
AMMO INC AMO STELTH 300 BLACKOUT 220 GR TMC 20RD BX $0.93/rd $18.63 In Stock 20h ago 9m ago Gman Sport
Fiocchi 300BLKHA Hyperformance 300 Blackout 125 gr SST 25 Bx 762344711188 $0.93/rd $23.32 In Stock 3d ago 17m ago Firearms Depot
Ammo Incorporated 300B220TMCSTLA20 stelTH 300 Blackout 220 gr Total Metal Jacket (TMJ) 20 Bx/ 10 Cs 818778022175 $0.94/rd $18.69 In Stock 12d ago 2m ago GunStuff TV
AMMOINC 300B110VMX-B200 300BO 110 VMAX 200/6 $0.94/rd $186.93 In Stock 20h ago 9m ago Gman Sport
Fiocchi Shooting Dynamics Rifle 300BLKC 50 rounds 762344711010 $0.94/rd $46.99 In Stock 4d ago 23m ago 6 Tactical
Winchester Ammo USA300BXVP USA Value Pack 300 Blackout 200 gr Open Tip 60 Bx/ 4 Cs $0.94/rd $56.40 In Stock 20h ago 9m ago Gman Sport
Federal American Eagle, 300 Blackout, 150 Grain, Full Metal Jacket, 20 Round Box AE300BLK1 604544617009 $0.94/rd $18.81 In Stock 31d ago 9m ago Foundry Outdoors

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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