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 RM300AAC6 Premier Match 300 Blackout 125 gr Sierra MatchKing Open Tip Match (OTM) 20 Round Box 047700410203 $2.14/rd $42.73 In Stock 29d ago 45m ago Cape Gun Works
Sellier & Bellot (S&B) 300BLKB Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 rounds 754908512454 $0.70/rd $13.90 In Stock 16d ago 2h ago Sentry Ammo
Black Hills Ammunition 300 Blackout 125gr OTM / Open Tip Match 2100 FPS 1224 Ft/Lb 20/box 612710127580 Free S/H over $250 $1.59/rd $31.72 In Stock 147d ago 1h ago AE Armory
Black Hills Ammunition 300 Blackout 198gr Dual Performance Subsonic 1050 FPS 485 Ft/Lb Lead Free 20/box 612710136483 Free S/H over $250 $2.97/rd $59.37 In Stock 147d ago 1h ago AE Armory
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx $1.18/rd $23.67 In Stock 122d ago 2h ago Dirty Bird Guns & Ammo
Winchester Ammo X300BLK Power-Point 300 Blackout 150 Grain 1890 fps Power-Point 20 rounds 020892231924 $0.90/rd $17.99 In Stock 38d ago 2h ago BH Ammo
NOVX Pentagon 300BLK125CP-20 850022779305 $2.05/rd $40.99 In Stock 157d ago 16m ago Get Loaded PA
AMMO, 300BLK, 125GR, ELITE BALL, FMJ, BOX/20 798681619634 $0.91/rd $18.18 In Stock 7d ago 21m ago Skogen’s Gun Supply
Federal F300BMSR2 Fusion MSR 300 Blackout 150 gr Fusion Soft Point 20 Round Box 604544624113 $1.55/rd $30.91 In Stock 29d ago 45m ago Cape Gun Works
Sellier & Bellot Tactical 300 AAC Blackout 124gr FMJ Ammo 2165 FPS SuperSonic 20/box 754908512447 Free S/H over $250 $0.78/rd $15.49 In Stock 79d ago 1h ago AE Armory
S&B 300 Blackout, 124 Grain, Ful 20 rounds 754908512447 $0.86/rd $17.11 In Stock 15h ago 45m ago Cape Gun Works
AMMO INCORPORATED 300B150FMJA20 818778021826 $0.65/rd $12.99 In Stock 6d ago 51m ago Charter Tactical
Barnes Bullets VOR-TX 300 Blackout 120 Grain TAC-TX Boat Tail Ammunition - 30827 100 Rounds! $1.63/rd $162.99 In Stock 14d ago 2h ago BH Ammo
Frontier Cartridge FR400 Rifle 300 Blackout 125 gr Full Metal Jacket (FMJ) 20 Round Box 090255713978 $1.00/rd $19.99 In Stock 29d ago 45m ago Cape Gun Works
Barnes Bullets VOR-TX 300 Blackout 120 Grain TAC-TX Boat Tail Ammunition - 30827 20 Rounds! $1.40/rd $27.99 In Stock 14d ago 2h ago BH Ammo
RangeTime RangeTime 300 Blackout Rangetime 150 grain FMJ 250 Round Case 781100777091 $0.62/rd $156.25 In Stock 8d ago 6m ago FlipAmmo
Sellier & Bellot 300BLKB Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Round Box 754908512454 $0.87/rd $17.39 In Stock 29d ago 45m ago Cape Gun Works
HSM 300BLK3N Game King 300 Blackout 125 gr Spitzer 20 Round Box 837306007200 $1.40/rd $27.96 In Stock 29d ago 45m ago Cape Gun Works
Winchester Ammo X300BLKX Super-X 300 Blackout 200 gr Power-Point (PP) 20 Bx/ 10 Cs 020892223325 $1.68/rd $33.56 In Stock 38d ago 21m ago Skogen’s Gun Supply
FSM 300-115-SCV 300BO 115GR SCS TUI 20 Round Box 758381721150 $1.71/rd $34.14 In Stock 29d ago 45m ago Cape Gun Works
Winchester Ammo RED300 USA Ready 300 Blackout 125 gr Open Tip 20 Round Box 020892226562 $1.17/rd $23.40 In Stock 21d ago 45m ago Cape Gun Works
AMMO, 300BLK, 120GR, SBR SOLID COPPER, BOX/20 798681594214 $1.90/rd $37.95 In Stock 23d ago 21m ago Skogen’s Gun Supply
Nosler 40127 Varmageddon 300 Blackout 110 gr Flat Base Tipped (FBT) 20 Round Box 054041401272 $1.59/rd $31.84 In Stock 5h ago 45m ago Cape Gun Works
Remington Ammunition L300AAC4V UMC 300 Blackout 220 gr Open Tip Flat Base 50 Round Box 047700490106 $1.47/rd $73.44 In Stock 5h ago 45m ago Cape Gun Works
Remington Ammunition .300 AAC Blackout 150 Grains Full Metal Jacketed Centerfire Rifle Ammo, 50 Rounds 047700486505 $1.03/rd $51.50 In Stock 16d ago 2h ago Sentry Ammo
Fiocchi 300BLKHA Hyperformance 300 Blackout 125 gr 2200 fps Super Shock Tip 25 Per Box/ 20 Cs 100 Rounds $0.97/rd $97.00 In Stock 20d ago 2h ago BH Ammo
Fiocchi 300BLKHA Hyperformance 300 Blackout 125 gr 2200 fps Super Shock Tip 25 Per Box/ 20 Cs 1000 Rounds $0.96/rd $964.00 In Stock 20d ago 2h ago BH Ammo
Federal Power-Shok Copper 300BLK150LFA 20 rounds 604544627756 $1.60/rd $31.99 In Stock 58d ago 16m ago Get Loaded PA
Fiocchi 300BLKHA Hyperformance 300 Blackout 125 gr 2200 fps Super Shock Tip 25 Per Box/ 20 Cs 500 Rounds $0.96/rd $479.00 In Stock 20d ago 2h ago BH Ammo
HSM 300BLK1N Match 300 Blackout 208 gr A-Max 20 Round Box 837306006777 $1.48/rd $29.58 In Stock 29d ago 45m ago Cape Gun Works
REM 26857 L300AAC2BC UMC 300BO BKT 150 FMJ 160 Round Box 047700486604 $1.32/rd $210.56 In Stock 29d ago 45m ago Cape Gun Works
Federal AE300BLK1 American Eagle 300 Blackout 150 gr Full Metal Jacket Boat Tail (FMJBT) 20 Round Box 604544617009 $1.04/rd $20.79 In Stock 5h ago 45m ago Cape Gun Works
REM 20111 L300AAC4BC UMC 300BO BKT 220 OTFB 160 Round Box 047700487403 $1.46/rd $233.99 In Stock 5h ago 45m ago Cape Gun Works
Federal 300BLK150LFA Power-Shok 300 Blackout 120 gr Copper Hollow Point 20 Round Box 604544627756 $1.74/rd $34.88 In Stock 29d ago 45m ago Cape Gun Works
NOVX 300BLK125CP-20 300BO 125G PENTAGON 20 Round Box 850022779305 $1.59/rd $31.84 In Stock 5h ago 45m ago Cape Gun Works
SAKO (TIKKA) JASTRG300BLK220B MatchKing 300 Blackout 220 gr 20 Per Box/ 10 Case 082442959511 $1.70/rd $33.92 In Stock 23d ago 21m ago Skogen’s Gun Supply
Winchester Ammo USA300BLK USA 300 Blackout 125 gr Open Tip Range 20 Round Box 020892224568 $0.90/rd $18.04 In Stock 2d ago 45m ago Cape Gun Works
Remington UMC 300 Blackout 220 Grain Open Tip Flat Base 100 Rounds 047700490106 $1.18/rd $118.00 In Stock 20d ago 2h ago BH Ammo
Remington UMC 300 Blackout 220 Grain Open Tip Flat Base 400 Rounds 047700490106 $1.21/rd $483.00 In Stock 20d ago 2h ago BH Ammo
Remington UMC 300 Blackout 220 Grain Open Tip Flat Base 50 Rounds 047700490106 $1.10/rd $55.00 In Stock 20d ago 2h ago BH Ammo
Armscor FAC300AAC2N Rifle 300 Blackout 208 gr A-Max 20 Round Box 812285021775 $1.46/rd $29.24 In Stock 5h ago 45m ago Cape Gun Works
HORN 808794 CUSTOM 300BO 110 CX 25 Round Box 090255720006 $1.38/rd $34.61 In Stock 5h ago 45m ago Cape Gun Works
120 ROUNDS 300 AAC BLACKOUT 125 GR FMJ ZINC PLATED STEEL 120 rounds 689481697116 $0.59/rd $71.00 In Stock 2d ago 2h ago Tulammozone
Advanced Armament Silencer Subsonic Ammo 300 AAC Blackout 220 GR OTFB 20 Round Box 047700479903 $1.47/rd $29.33 In Stock 29d ago 45m ago Cape Gun Works
Sellier & Bellot SB300BLKA Rifle 300 Blackout 124 gr Full Metal Jacket 20 Per Box/ 50 Case 100 Rounds $0.68/rd $67.99 In Stock 20d ago 2h ago BH Ammo
Sellier & Bellot SB300BLKA Rifle 300 Blackout 124 gr Full Metal Jacket 20 Per Box/ 50 Case 1000 Rounds $0.70/rd $704.99 In Stock 20d ago 2h ago BH Ammo
Liberty Ammunition LAHAC300044 Animal Instinct 300 Blackout 96 gr Copper Hollow Point 20 Round Box 019962272134 $2.44/rd $48.90 In Stock 29d ago 45m ago Cape Gun Works
Sellier & Bellot SB300BLKA Rifle 300 Blackout 124 gr Full Metal Jacket 20 Per Box/ 50 Case 500 Rounds $0.71/rd $354.99 In Stock 20d ago 2h ago BH Ammo
Sellier & Bellot SB300BLKXA eXergy 300 Blackout 110 gr TAC EX Blue 20 Per Box/ 50 Case 100 Rounds $0.98/rd $97.99 In Stock 20d ago 2h ago BH Ammo
Sellier & Bellot SB300BLKXA eXergy 300 Blackout 110 gr TAC EX Blue 20 Per Box/ 50 Case 1000 Rounds $1.00/rd $994.99 In Stock 20d ago 2h ago BH Ammo

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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