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
Precision One 300 AAC Blackout Ammunition 125 Grain Nosler Ballistic Tip 20 rounds $1.15/rd $22.99 In Stock 28d ago 58m ago Outdoor Limited
REM 26854 L300AAC2 UMC 300BO 150 FMJ 20/10 047700486406 $1.15/rd $22.99 In Stock 6d ago 6m ago GunZoneDeals
Hornady: BLACK 300 Blackout, 110gr V-MAX , 20/Box 090255808735 $1.15/rd $22.99 In Stock 163d ago 2h ago Mile High Shooting
Winchester Ammo Super Suppressed 300 Blackout 200 gr Open Tip Range 20rd Box 020892224483 $1.15/rd $22.99 In Stock 15d ago 17m ago Tombstone Tactical
HORNADY SUBSONIC AMMUNITION .300 BLACKOUT 190 GRAIN SUB-X 20 ROUND BOX 090255808773 $1.15/rd $22.99 In Stock 147d ago 2h ago Cheap Gun Club
Federal AE300BLKSUP2 American Eagle Suppressor 300 Blackout 220 gr Open Tip Match (OTM) 20 Bx/ 25 Cs 029465064617 $1.15/rd $22.99 In Stock 13d ago 6m ago GunZoneDeals
Federal 300BLKB Power-Shok 300 Blackout 150 gr Soft Point (SP) 20 Bx/ 10 Cs 604544650488 $1.15/rd $22.99 In Stock 77d ago 6m ago GunZoneDeals
Armscor 300BO HPBT FAC300AAC3N 20 rounds 812285022048 $1.15/rd $22.99 In Stock 3d ago 49m ago Charter Tactical
Sierra SIERRA OTDMST 300BLK 115GR HP 20/200 092763600214 $1.15/rd $22.99 In Stock 6d ago 8m ago BFG Outfitters
HSM Game King Spitzer 300BLK3N 20 rounds 837306007200 $1.15/rd $22.99 In Stock 38d ago 2h ago Hot Ammo
HSM Subsonic A-Max 300BLK1N 20 rounds 837306006777 $1.15/rd $22.99 In Stock 6d ago 8m ago BFG Outfitters
HSM Game King Spitzer 300BLK3N 20 rounds 837306007200 $1.15/rd $22.99 In Stock 5d ago 49m ago Charter Tactical
Remington Ammunition 26854 20 rounds 047700486406 $1.15/rd $22.99 In Stock 43d ago 1h ago United Patriot Supply
FRONTIER 300 BLACKOUT 125GR FMJ 20/2 090255713978 $1.15/rd $22.99 In Stock 27d ago 14m ago DB Firearms
FEDERAL AMERICAN EAGLE .300 aac blackout 150 grain full metal jacket boat tail (fmjbt) 20 rounds 604544617009 $1.15/rd $22.99 In Stock 50d ago 52m ago Guns.com
Winchester USA Target .300 AAC Blackout 125 Grain FMJ Centerfire Rifle Ammo .300 AAC Blackout 125 Grain SKU:2499402 $1.15/rd $22.99 In Stock 13d ago 14m ago Cabelas
Frontier Cartridge FR400 Rifle 300 Blackout 125 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs 090255713978 $1.15/rd $22.99 In Stock 93d ago 6m ago Gulf Coast Gun & Outdoors
Herter's Target .300 AAC Blackout 200 Grain Centerfire Rifle Ammo .300 AAC Blackout 200 Grain SKU:2672460 $1.15/rd $22.99 In Stock 13d ago 14m ago Cabelas
Armscor FAC300AAC3N Rifle 300 Blackout 220 gr Boat Tail Hollow Point (BTHP) 20 Bx/ 10 Cs 812285022048 $1.15/rd $22.99 In Stock 3d ago 6m ago GunZoneDeals
Herter's Target .300 AAC Blackout 200 Grain Centerfire Rifle Ammo .300 AAC Blackout 200 Grain SKU:2672460 $1.15/rd $22.99 In Stock 17d ago 41m ago Bass Pro Shops
Winchester USA Target .300 AAC Blackout 125 Grain FMJ Centerfire Rifle Ammo .300 AAC Blackout 125 Grain SKU:2499402 $1.15/rd $22.99 In Stock 108d ago 41m ago Bass Pro Shops
Federal FDR 300BLK 150GR SP PWR-SHK 20 rounds 604544650488 $1.15/rd $22.99 In Stock 6d ago 8m ago BFG Outfitters
Sierra A462510 20 rounds 612710135424 $1.15/rd $22.99 In Stock 7d ago 1h ago United Patriot Supply
HSM 300BLK3N Game King 300 Blackout 125 gr Spitzer 20 Bx/ 10 Cs 837306007200 $1.15/rd $22.99 In Stock 77d ago 6m ago GunZoneDeals
DoubleTap 300 AAC Blackout Ammunition Colt Defense DT300BLK125CD20 125 Grain Hollow Point 20 Rounds 753387048553 $1.15/rd $22.99 In Stock 171d ago 58m ago Outdoor Limited
Federal 300 AAC Blackout American Eagle AE300BLK1 150 Grain Full Metal Jacket 20 rounds 604544617009 $1.15/rd $22.99 In Stock 171d ago 58m ago Outdoor Limited
Federal FDR 300BLK 150GR SP PWR-SHK 20 rounds 604544650488 $1.15/rd $22.99 In Stock 105d ago 2h ago Hot Ammo
Federal American Eagle FMJBT AE300BLK1 20 rounds 604544617009 $1.15/rd $22.99 In Stock 77d ago 17m ago Sahuarita Guns
Sellier & Bellot 300 AAC Blackout Ammunition Exergy Blue SB300BLKXA 110 Grain Lead Free Ballistic Tip 20 Rounds 754908512720 $1.15/rd $22.99 In Stock 30d ago 58m ago Outdoor Limited
Federal American Eagle Rifle Suppressor AE300BLKSUP2 20 rounds 029465064617 $1.15/rd $22.99 In Stock 16d ago 2h ago Hot Ammo
Hornady Frontier 300 Blackout 125 Grain Full Metal Jacket 20 Rounds $1.15/rd $22.99 In Stock 11h ago 50m ago Midsouth Shooters Supply
Winchester Silvertip .300 Blackout Ammunition 150 Grain Defense Tip 1900 fps 20 Rounds 020892229891 $1.15/rd $23.00 In Stock 120d ago 31m ago BH Ammo
Winchester Ammo RED300 USA Ready 300 Blackout 125 gr Open Tip 20 Bx/ 10 Cs 020892226562 $1.15/rd $23.00 In Stock 8d ago 4m ago Acute Firearms
Federal Fusion MSR 300 Blackout 150 Grain Fusion Soft Point 100 Rounds $1.15/rd $115.00 In Stock 120d ago 31m ago BH Ammo
Armscor USA Subsonic 300 Blackout Ammo 220 grain HPBT Case of 200 Rounds 300AAC-3N $1.15/rd $229.99 In Stock 50d ago 1h ago Gunprime
HSM 300BLK3N Game King 300 Blackout 125 gr Pro Hunter 20 Per Box/ 25 Cs 837306007200 $1.15/rd $23.02 In Stock 11d ago 31m ago Hinterland Outfitters
Armscor FAC300AAC3N Rifle 300 Blackout 220 gr Boat Tail Hollow Point (BTHP) 20 Bx/ 10 Cs 812285022048 $1.15/rd $23.02 In Stock 3d ago 1h ago Huligan Arms
HSM Ammo .300Aac Blackout 125gr. Sierra JSP 20-Pack 837306007200 $1.15/rd $23.03 In Stock 66d ago 15m ago Foundry Outdoors
Aguila Ammunition .300 AAC Blackout 150 Grain Full Metal Jacket, Brass Case, RifleAmmo, 50 Rounds, 1E300110 640420003313 $1.15/rd $57.59 In Stock 9h ago 4h ago Optics Planet
HSM 300BLK14N 300 BO 150 SPBT 20/25 810742029029 $1.15/rd $23.05 In Stock 16d ago 4m ago Acute Firearms
REM 20111 L300AAC4BC UMC 300BO BKT 220 OTFB 160/4 047700487403 $1.15/rd $184.52 In Stock 29d ago 46s ago Locked Loaded
Remington Ammunition L300AAC4 UMC 300 AAC Blackout 220 GR Open Tip Flat Base (OTFB) 20 Bx/ 10 Cs 047700414805 $1.15/rd $23.07 In Stock 29d ago 46s ago Locked Loaded
Hornady 80891 Black 300 Blackout 208 gr A-Max 20 Bx/ 10 Cs 090255808919 $1.15/rd $23.07 In Stock 29d ago 46s ago Locked Loaded
Remington UMC, .300 AAC Blackout, FMJ, 220 Grain, 20 Rounds $1.15/rd $23.08 In Stock 3d ago 21m ago Sportsman's Guide
Hsm 300 Aac 110gr V-max - 20rd 25bx/cs 837306006791 $1.15/rd $23.08 In Stock 13d ago 35m ago Tactical Surplus USA
REM 20111 L300AAC4BC UMC 300BO BKT 220 OTFB 160/4 047700487403 $1.15/rd $184.66 In Stock 43d ago 25m ago Dack Outdoors
REM 20109 L300AAC4BP UMC 300BO 220OTFB 200 LOOSE 047700487601 $1.15/rd $230.70 In Stock 15d ago 46s ago Locked Loaded
REM 20107 L300AAC2BP UMC 300BO 150FMJ 200 LOOSE 047700487502 $1.15/rd $230.70 In Stock 1d ago 46s ago Locked Loaded
REM 20107 L300AAC2BP UMC 300BO 150FMJ 200 LOOSE 047700487502 $1.15/rd $230.86 In Stock 1d ago 25m ago Dack Outdoors
REM 20109 L300AAC4BP UMC 300BO 220OTFB 200 LOOSE 047700487601 $1.15/rd $230.86 In Stock 15d ago 25m ago Dack 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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