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 UMC 300 Blackout 220 Grain Open Tip Flat Base 100 Rounds 047700490106 $1.18/rd $118.00 In Stock 20d ago 33m ago BH Ammo
Barnes 300 Aac Blackout 120gr - Jhp Fb 20rd 10bx/cs 716876120307 $1.18/rd $23.63 In Stock 14d ago 38m ago Tactical Surplus USA
REM 26857 L300AAC2BC UMC 300BO BKT 150 FMJ 160/4 047700486604 $1.18/rd $189.10 In Stock 16d ago 7m 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 67d ago 17m ago Foundry Outdoors
HSM 300BLK3N Game King 300 Blackout 125 gr Spitzer 20 Bx/ 10 Cs 837306007200 $1.18/rd $23.66 In Stock 29d ago 7m ago Guns 2 Ammo
HSM 300BLK3N Game King 300 Blackout 125 gr Spitzer 20 Bx/ 10 Cs 837306007200 $1.18/rd $23.66 In Stock 15d ago 1h ago Huligan Arms
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx $1.18/rd $23.67 In Stock 122d ago 47m ago Dirty Bird Guns & Ammo
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs 812285021089 $1.18/rd $23.67 In Stock 29d ago 7m ago Guns 2 Ammo
Remington UMC Freedom Bucket 300 Blackout 150 gr 1905 fps Full Metal Jacket (FMJ) Ammo 160 Round $1.18/rd $189.50 In Stock 1h ago 116d ago Wholesale Hunter
Rem 300blk 220gr Subsonic 20/200 047700479903 $1.18/rd $23.69 In Stock 14d ago 38m ago Tactical Surplus USA
Armscor USA .300 AAC BLACKOUT, 220gr, HPBT - 20 Rounds [MPN: FAC300AAC3N] 812285022048 $1.18/rd $23.70 In Stock 4d ago 28m ago Firearms Depot
Remington UMC Loose Bulk Rifle Ammunition .300 AAC Blackout 150gr FMJ 1905 fps 200/ct (Bulk Pack) 047700487502 $1.18/rd $236.99 In Stock 2d ago 10m ago HD Tactical
Remington UMC Loose Bulk Rifle Ammunition .300 AAC Blackout 220gr FMJ 1015 fps 200/ct (Bulk Pack) 047700487601 $1.18/rd $236.99 In Stock 16d ago 10m ago HD Tactical
Armscor FAC300AAC3N Rifle 300 Blackout 220 gr Boat Tail Hollow Point (BTHP) 20 Bx/ 10 Cs 812285022048 $1.19/rd $23.72 In Stock 4d ago 1h ago Skogen’s Gun Supply
HSM 300BLK1N Match 300 Blackout 208 gr A-Max 20 Bx/ 25 Cs 837306006777 $1.19/rd $23.72 In Stock 94d ago 27m ago Dack Outdoors
Remington UMC Freedom Bucket .300 AAC Blackout 150gr FMJ 1905 fps 160/ct 047700486604 $1.19/rd $189.99 In Stock 30d ago 10m ago HD Tactical
Remington UMC Freedom Bucket .300 AAC Blackout 220gr OTFB 940 fps 160/ct Bucket 047700487403 $1.19/rd $189.99 In Stock 30d ago 10m ago HD Tactical
BAR 300BLK 120GR JHP BT RANGE AR 20/10 716876120307 $1.19/rd $23.75 In Stock 16d ago 7m ago Acute Firearms
Fiocchi 300BLKHA Hyperformance 300 Blackout 125 gr 2200 fps Super Shock Tip (SST) 25 Bx/20 Cs 762344711188 $1.19/rd $29.69 In Stock 11d ago 1h ago Ammo Joy
HSM 300BLK3N Game King Hunting 300 Blackout 125 Gr Pro-Hunter (PH) 20 Rounds Per Box 837306007200 $1.19/rd $23.77 In Stock 16d ago 27m ago Beebe Family Arms & Munitions
Atomic 00465 Rifle Subsonic 300 Blackout 220 gr Hollow Point Boat Tail 50 Bx/ 10 Cs 858767004652 $1.19/rd $59.44 In Stock 3d ago 3m ago Locked Loaded
Federal Ammo Ae .300Aac Blackout 220gr. Otm Subsonic 20-Pack 029465064617 $1.19/rd $23.80 In Stock 3d ago 17m ago Foundry Outdoors
HSM 300BLK1N Subsonic 300 AAC Blackout/Whisper (7.62X35mm) 208 GR AMAX 20 Bx/ 25 Cs 837306006777 $1.19/rd $23.80 In Stock 67d ago 17m ago Foundry Outdoors
Federal American Eagle Subsonic 300 AAC Blackout Ammo - 500 Rounds... 50029465064612 $1.19/rd $594.99 In Stock 3d ago 24m ago Ammo.com
Winchester Ammo X300BLKDS Deer Season XP 300 Blackout 150 gr Extreme Point 20 Bx/ 10 Cs 020892222670 $1.19/rd $23.86 In Stock 7d ago 3m ago Locked Loaded
HSM Game King .300 AAC BLACKOUT, 125gr, JSP - 20 Rounds [MPN: 300BLK3N] 837306007200 $1.19/rd $23.88 In Stock 4d ago 28m ago Firearms Depot
Federal 300BLKB Power-Shok 300 Blackout 150 gr Soft Point (SP) 20 Bx/ 10 Cs 604544650488 $1.19/rd $23.88 In Stock 11h ago 1h ago Skogen’s Gun Supply
Magtech eXergy Tactical 300 Blackout, 110gr, TAC-EX-Blue, 20rd Box 754908512720 $1.20/rd $23.89 In Stock 86d ago 17m ago Impact Guns
Federal American Eagle .300 Blackout Ammunition 20 Rounds FMJ 150 Grains AE300BLK1 604544617009 $1.20/rd $23.89 In Stock 23d ago 28m ago Cheaper Than Dirt
Hornady V-Max Black Brass .300 AAC Blackout 110-Grain 20-Rounds 090255808735 $1.20/rd $23.89 In Stock 14d ago 44m ago GrabAGun.com
HSM 300BLK3N Game King 300 Blackout 125 gr Spitzer 20 Bx/ 10 Cs 837306007200 $1.20/rd $23.90 In Stock 54d ago 1h ago Skogen’s Gun Supply
Fed 300blk 150gr Power-shk Sp 20/200 604544650488 $1.20/rd $23.91 In Stock 14d ago 38m ago Tactical Surplus USA
S&B eXergy Blue Solid Copper 300 Blackout 110gr 20/RD 754908512720 $1.20/rd $23.91 In Stock 12d ago 7m ago Acute Firearms
BARNES PREC MTH 300BLK 125GR 20 Round Box 716876300129 $1.20/rd $23.91 In Stock 14h ago 2h ago Cape Gun Works
Hornady BLACK, .300 AAC Blackout, A-MAX, 208 Grain, 20 Rounds $1.20/rd $23.93 In Stock 4d ago 23m ago Sportsman's Guide
Winchester Ammo X300BLKDS Deer Season XP 300 Blackout 150 gr Extreme Point 20 Bx/ 10 Cs 020892222670 $1.20/rd $23.94 In Stock 7d ago 23m ago Defense Depot
NOVX 300BLK125CP-20 300BO 125G PENTAGON 20/10 850022779305 $1.20/rd $23.94 In Stock 3d ago 1h ago Skogen’s Gun Supply
Hornady 80873 Black 300 Blackout 110 gr Hornady V Max 20 Per Box/ 10 Cs 090255808735 $1.20/rd $23.95 In Stock 11d ago 34m ago Hinterland Outfitters
Remington Ammunition 21422 UMC 300 Blackout 220 gr Open Tip Flat Base 20 Per Box/ 10 Cs 047700414805 $1.20/rd $23.95 In Stock 11d ago 34m ago Hinterland Outfitters
HORN 808794 CUSTOM 300BO 110 CX 25/10 090255720006 $1.20/rd $29.94 In Stock 15d ago 1h ago Huligan Arms
200 Round Case - 300 Blackout 125 Grain FMJ Hornady Frontier Ammo - FR400 $1.20/rd $239.50 5 167d ago 33m ago SGAmmo
200 Round Case - 300 AAC Blackout 150 Grain FMJ Loose Pack Remington Training Ammo - SP21114 $1.20/rd $239.50 8 167d ago 33m ago SGAmmo
Federal AE300BLKSUP2 American Eagle Suppressor 300 Blackout 220 gr Open Tip Match (OTM) 20 Bx/ 25 Cs 029465064617 $1.20/rd $23.97 In Stock 15d ago 1h ago Huligan Arms
Fiocchi 300BLKMB Extrema 300 Blackout 220 gr Sierra MatchKing Boat-Tail Hollow Point (BTHP) 25 Bx/ 20 Cs 762344711690 $1.20/rd $29.98 In Stock 78d ago 8m ago GunZoneDeals
REM 26855 L300AAC2V UMC 300BO VP 150 FMJ 50/8 047700486505 $1.20/rd $59.94 In Stock 18d ago 1h ago SHTF Tactical
REMINGTON UMC Value Pack 300 AAC Blackout 150gr Full Metal Jacket Ammunition | 50 Rounds 047700486505 $1.20/rd $59.94 In Stock 8d ago 3m ago KyGunCo
50 Round Box - 300 Blackout 125 Grain HP Hornady American Gunner Ammo - 80897 $1.20/rd $59.95 28 66d ago 33m ago SGAmmo
Federal American Eagle .300 AAC Blackout 150 Grain Full Metal Jacket Boat-Tail Centerfire Rifle Ammo .300 AAC Blackout 150 Grain SKU:4517004 $1.20/rd $23.99 In Stock 14d ago 16m ago Cabelas
WINCHESTER - 300 AAC Blackout 125gr Supersonic Open Tip 20/Box 020892224568 $1.20/rd $23.99 In Stock 2d ago 2h ago Brownells
HSM 300 Blackout Ammunition HSM-300BLK-14-N 150 Grain Soft Point Boat Tail 20 Rounds 810742029029 $1.20/rd $23.99 In Stock 172d ago 1h ago Outdoor Limited

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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