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
Remington Ammunition 26857 UMC Freedom Bucket 300 Blackout 150 gr Full Metal Jacket 160 Per Bucket $1.16/rd $184.99 In Stock 3d ago 37m ago DEGUNS.NET
REM 20111 L300AAC4BC UMC 300BO BKT 220 OTFB 160/4 047700487403 $1.16/rd $185.18 In Stock 14d ago 7m ago Defense Depot
Hornady 80873 Black 300 Blackout 110 gr V-Max 20 Bx/ 10 Cs 090255808735 $1.16/rd $23.16 In Stock 14d ago 7m ago Defense Depot
Hornady 80891 Black 300 Blackout 208 gr A-Max 20 Bx/ 10 Cs 090255808919 $1.16/rd $23.16 In Stock 14d ago 7m ago Defense Depot
Remington Ammunition L300AAC4 UMC 300 AAC Blackout 220 GR Open Tip Flat Base (OTFB) 20 Bx/ 10 Cs 047700414805 $1.16/rd $23.16 In Stock 14d ago 7m ago Defense Depot
Remington Ammunition L300AAC4V UMC 300 Blackout 220 gr Open Tip Flat Base 50 Bx/ 8 Cs 047700490106 $1.16/rd $57.89 In Stock 14d ago 7m ago Defense Depot
REM 20107 L300AAC2BP UMC 300BO 150FMJ 200 LOOSE 047700487502 $1.16/rd $231.53 In Stock 14d ago 7m ago Defense Depot
REM 20109 L300AAC4BP UMC 300BO 220OTFB 200 LOOSE 047700487601 $1.16/rd $231.53 In Stock 14d ago 7m ago Defense Depot
Remington Ammunition 26854 UMC 300 Blackout 150 Gr Full Metal Jacket (FMJ) 20 Rounds Per Box 047700486406 $1.16/rd $23.17 In Stock 16d ago 10m ago Beebe Family Arms & Munitions
Remington Umc 300 Aac 150g Fmj - 50rd 8bx/cs 047700486505 $1.16/rd $57.95 In Stock 13d ago 21m ago Tactical Surplus USA
Fiocchi 300BLKHA Hyperformance 300 Blackout 125 gr Super Shock Tip 25 Per Box 20 Cs 762344711188 $1.16/rd $28.99 In Stock 27d ago 30m ago DB Firearms
Atomic Subsonic HPBT 00465 50 rounds 858767004652 $1.16/rd $57.99 In Stock 2d ago 54m ago BFG Outfitters
Remington Ammunition UMC L300AAC4V 50 rounds 047700490106 $1.16/rd $57.99 In Stock 6d ago 54m ago BFG Outfitters
Federal American Eagle Suppressor 300 Blackout 220 Gr Open Tip Match 20 Rounds Per Box 029465064617 $1.16/rd $23.21 In Stock 13d ago 10m ago Beebe Family Arms & Munitions
Ammo Inc 300B168BTHPA20 Signature 300 Blackout 168 gr Hollow Point Boat-Tail 20 Per Box 10 Cs 20 Gauge rounds 818778023608 $1.16/rd $23.22 In Stock 9d ago 30m ago DB Firearms
Federal AE300BLK1 American Eagle 300 Blackout 150 gr Full Metal Jacket Boat Tail (FMJBT) 20 Bx/ 25 Cs 604544617009 $1.16/rd $23.23 In Stock 69d ago 51m ago The Armories
Remington UMC Rifle .300 AAC BLACKOUT, 150gr, FMJ - 20 Rounds [MPN: 26854] 047700486406 $1.16/rd $23.28 In Stock 6d ago 11m ago Firearms Depot
Sierra A462510 GameChanger 300 Blackout 125 gr Tipped GameKing 20 Bx/ 10 Cs 612710135424 $1.16/rd $23.28 In Stock 13d ago 15m ago BattleHawk Armory
Fiocchi 300BLKMB Extrema 300 Blackout 220 gr Sierra MatchKing Boat-Tail Hollow Point (BTHP) 25 Bx/ 20 Cs 762344711690 $1.16/rd $29.10 In Stock 5d ago 20m ago Acute Firearms
Winchester USA RIFLE .300 AAC Blackout 200 grain Full Metal Jacket Centerfire Rifle Ammo, 20 Rounds, USA300BLKX 020892224582 $1.16/rd $23.29 In Stock 2d ago 3h ago Optics Planet
REM 26854 L300AAC2 UMC 300BO 150 FMJ 20/10 047700486406 $1.16/rd $23.30 In Stock 6d ago 1h ago Skogen’s Gun Supply
Federal AE300BLKSUP2 American Eagle Suppressor 300 Blackout 220 gr Open Tip Match (OTM) 20 Bx/ 25 Cs 029465064617 $1.17/rd $23.32 In Stock 31d ago 1h ago Skogen’s Gun Supply
Sig E300A1-20 300BLK Match Grade Supersonic 125GR Sierra MatchKing 20Box/25Case 798681514489 $1.17/rd $23.32 In Stock 65d ago 1h ago Cape Gun Works
Federal American Eagle, Suppressor Ammunition, 300AAC Blackout, 220 Grain, Open Tip Match, 20 Round Box AE300BLKSUP2 029465064617 $1.17/rd $23.33 In Stock 66d ago 44s ago Foundry Outdoors
Armscor FAC300AAC3N Rifle 300 Blackout 220 gr Boat Tail Hollow Point (BTHP) 20 Bx/ 10 Cs 812285022048 $1.17/rd $23.35 In Stock 3d ago 15m ago BattleHawk Armory
Fed Ae Suppressor 300blk 220gr Ot 20 029465064617 $1.17/rd $23.35 In Stock 13d ago 21m ago Tactical Surplus USA
Winchester Power-Point 300 Blackout, 150gr, 1890 fps, 20rd Box 020892231924 $1.17/rd $23.39 In Stock 22d ago 30m ago Impact Guns
Winchester Ammo RED300 USA Ready 300 Blackout 125 gr Open Tip 20 Round Box 020892226562 $1.17/rd $23.40 In Stock 20d ago 1h ago Cape Gun Works
Federal AE300BLK1 American Eagle 300 Blackout 150 gr Full Metal Jacket Boat Tail (FMJBT) 20 Bx/ 25 Cs 604544617009 $1.17/rd $23.45 In Stock 16d ago 20m ago Acute Firearms
HSM 300BLK1N Match 300 Blackout 208 gr A-Max 20 Bx/ 25 Cs 837306006777 $1.17/rd $23.46 In Stock 29d ago 16m ago Locked Loaded
REM 26857 L300AAC2BC UMC 300BO BKT 150 FMJ 160/4 047700486604 $1.17/rd $187.89 In Stock 15d ago 3m ago Tombstone Tactical
WIN X300BLK 300BO 150PSP PWRPNT 20/10 020892231924 $1.18/rd $23.49 In Stock 16d ago 20m ago Acute Firearms
REM 26854 L300AAC2 UMC 300BO 150 FMJ 20/10 047700486406 $1.18/rd $23.49 In Stock 6d ago 15m ago BattleHawk Armory
Federal American Eagle Rifle Suppressor .300 AAC Blackout 220 Grain Open Tip Match 20rds Per Box (AE300BLKSUP2)- FREE SHIPPING ON ORDERS OVER $175 029465064617 $1.18/rd $23.49 In Stock 59d ago 20m ago Bucking Horse Outpost
REM 20111 L300AAC4BC UMC 300BO BKT 220 OTFB 160/4 047700487403 $1.18/rd $187.99 In Stock 30d ago 21m ago GunZoneDeals
REM 20107 L300AAC2BP UMC 300BO 150FMJ 200 LOOSE 047700487502 $1.18/rd $234.99 In Stock 30d ago 21m ago GunZoneDeals
REM 20109 L300AAC4BP UMC 300BO 220OTFB 200 LOOSE 047700487601 $1.18/rd $234.99 In Stock 30d ago 21m ago GunZoneDeals
Federal Fusion MSR 300 Blackout 150 Grain Fusion Soft Point 200 Rounds $1.18/rd $235.00 In Stock 120d ago 17m ago BH Ammo
Federal AE300BLKSUP2 American Eagle Suppressor 300 Blackout 220 gr Open Tip Match (OTM) 20 Bx/ 25 Cs 029465064617 $1.18/rd $23.51 In Stock 13d ago 15m ago BattleHawk Armory
Advanced Armament Silencer Subsonic Ammo 300 AAC Blackout 220 GR OTFB 20 Bx/ 10 Cs 047700479903 $1.18/rd $23.52 In Stock 20h ago 11m ago Dack Outdoors
HSM 300BLK1N Match 300 Blackout 208 gr A-Max 20 Bx/ 25 Cs 837306006777 $1.18/rd $23.54 In Stock 14d ago 7m ago Defense Depot
Sellier & Bellot SB300BLKXA eXergy 300 Blackout 110 gr TAC EX Blue Ammo $1.18/rd $23.59 In Stock 11h ago 37m ago DEGUNS.NET
Ammo Inc 300B168BTHPA20 Signature 300 Blackout 168 gr Hollow Point Boat-Tail (HPBT) 20 Per Box/10 Cs 818778023608 $1.18/rd $23.59 In Stock 9d ago 55m ago Ammo Joy
Remington UMC Brass .300 AAC Blackout 150-Grain 20-Rounds FMJ 047700486406 $1.18/rd $23.59 In Stock 6d ago 28m ago GrabAGun.com
Federal American Eagle Suppressor Brass .300 AAC Blackout 220-Grain 20-Rounds OTM 029465064617 $1.18/rd $23.59 In Stock 13d ago 28m ago GrabAGun.com
Remington Ammunition L300AAC4V UMC 300 Blackout 220 gr Open Tip Flat Base 50 Bx/ 8 Cs 047700490106 $1.18/rd $58.99 In Stock 77d ago 21m ago GunZoneDeals
Remington UMC 300 Blackout 220 Grain Open Tip Flat Base 100 Rounds 047700490106 $1.18/rd $118.00 In Stock 20d ago 17m ago BH Ammo
Barnes 300 Aac Blackout 120gr - Jhp Fb 20rd 10bx/cs 716876120307 $1.18/rd $23.63 In Stock 13d ago 21m ago Tactical Surplus USA
REM 26857 L300AAC2BC UMC 300BO BKT 150 FMJ 160/4 047700486604 $1.18/rd $189.10 In Stock 16d ago 20m ago Acute Firearms
Hornady 80873 Black 300 AAC Blackout/Whisper (7.62x35mm) 110 GR V-Max 20 Bx/ 10 Cs 090255808735 $1.18/rd $23.66 In Stock 66d ago 44s 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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