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
Sellier Bellot SB300BLKA Rifle 300 Blackout 124 gr Full Metal Jacket 20 Per Box/ 50 Case 754908512447 $0.70/rd $13.92 In Stock 11d ago 8m ago Hinterland Outfitters
Ammo Inc 300B155BTHPA20 Match 115 Grain .300 AAC Blackout 818778023790 $0.70/rd $13.92 In Stock 6h ago 2h ago Sentry Ammo
Fiocchi 300 AAC Blackout Ammunition FI300BLKC 150 Grain Full Metal Jacket Boat Tail 500 rounds $0.70/rd $349.00 In Stock 163d ago 3m ago Outdoor Limited
Ammo Inc. Signature .300 Blackout 150 Grains FMJ 200 Rounds 300B150FMJ-A200 818778023349 $0.70/rd $139.89 In Stock 93d ago 25m ago Cheaper Than Dirt
Wolf Polyformance 300 Blackout Ammo 145 Grain FMJ Steel Case Box of 20 - steel case 645611308673 $0.70/rd $13.99 In Stock 204d ago 56m ago Target Sports USA
WIN USA 300BLK 147GR FMJ 20/10 020892231030 $0.70/rd $13.99 In Stock 2d ago 4m ago GunZoneDeals
Armscor 300BO FMJ FAC300AAC1N 20 rounds 812285021089 $0.70/rd $13.99 In Stock 10d ago 24m ago Get Loaded PA
Ammo Inc Signature 300 Blackout 110 Gr V-Max 20 Round Box $0.70/rd $13.99 In Stock 4h ago 223d ago Wholesale Hunter
AMMO INCORPORATED 300B150FMJA20 818778021826 $0.70/rd $13.99 In Stock 97d ago 1h ago Miami Police Depot
Armscor 300BO FMJ FAC300AAC1N 20 rounds 812285021089 $0.70/rd $13.99 In Stock 97d ago 1h ago Miami Police Depot
Armscor 300BO FMJ FAC300AAC1N 20 rounds 812285021089 $0.70/rd $13.99 In Stock 101d ago 56m ago United Patriot Supply
AMMO INCORPORATED Ammo Inc, Signature, 300 Black 20 rounds 818778021826 $0.70/rd $13.99 In Stock 128d ago 56m ago United Patriot Supply
Sellier & Bellot 300BLKA Rifle 300 Blackout 124 gr Full Metal Jacket 20 Bx/ 50 Cs 754908512447 $0.70/rd $13.99 In Stock 2d ago 4m ago GunZoneDeals
Sellier & Bellot Rifle FMJ 300BLKA 20 rounds 754908512447 $0.70/rd $13.99 In Stock 113d ago 9m ago Charter Tactical
Winchester Ammo 300 Blackout 125gr FMJ 2185 FPS 20/box 020892224568 Free S/H over $250 $0.70/rd $13.99 In Stock 11d ago 47m ago AE Armory
RUAG Swiss P .300 Blackout High Velocity Lead Free Styx Action 108 grain Hyper Expanding Copper Hollow Point 2444 FPS (30 round box) $0.70/rd $21.00 In Stock 2h ago 10m ago Rivertown Munitions
Fiocchi 300 AAC Blackout Ammunition FI300BLKC 150 Grain Full Metal Jacket Boat Tail 50 rounds 762344711010 $0.70/rd $34.99 In Stock 163d ago 3m ago Outdoor Limited
Hyperion Munitions HMBX300BLK22050 300 Blackout 220 gr Full Metal Jacket 50 Per Box/10 Case 810108164371 $0.70/rd $35.00 In Stock 3d ago 15m ago Locked Loaded
Armscor .300 BLK 147 Grain FMJ Rifle Ammo - 100 round box $0.70/rd $69.99 In Stock 8d ago 15m ago Dirty Bird Guns & Ammo
WOLF POLYFORMANCE BULK .300BLK (200 ROUNDS) .300 aac blackout 145 grain full metal jacket (fmj) 200 rounds 645611308673-10 $0.70/rd $139.99 In Stock 2d ago 57m ago Guns.com
Wolf Polyformance 300 Blackout Ammo 145 Grain FMJ Steel Case Case of 500 (25 Boxes of 20) - Free Shipping - steel case 645611308673 $0.70/rd $349.75 In Stock 204d ago 56m ago Target Sports USA
Ammo Inc. - Full Metal Jacket - 150 Grain 300 AAC Blackout Ammo - 500 Rounds $0.70/rd $349.99 In Stock 127d ago 2h ago CheapAmmo.com
Ammo Inc. Signature Brass .300 Blackout 150 Grain 20-Rounds FMJ 818778021826 $0.70/rd $14.09 In Stock 2d ago 16m ago GrabAGun.com
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 127d ago 29m ago BH Ammo
ARMSCOR 300 AAC Blackout 147gr Full Metal Jacket Ammunition | 20 Rounds 812285021089 $0.71/rd $14.12 In Stock 10d ago 14m ago KyGunCo
S&b 300blk 124gr Fmj 20/1000 754908512447 $0.71/rd $14.16 In Stock 4d ago 1h ago Tactical Surplus USA
Sellier & Bellot 300BLKA Rifle 300 Blackout 124 gr Full Metal Jacket 20 Bx/ 50 Cs 754908512447 $0.71/rd $14.16 In Stock 2d ago 35m ago Skogen’s Gun Supply
Sellier & Bellot SB300BLKA Rifle 300 Blackout 124 Gr Full Metal Jacket (FMJ) 20 Rounds Per Box 754908512447 $0.71/rd $14.18 In Stock 2d ago 28m ago Beebe Family Arms & Munitions
Dogtown 300 AAC Blackout Ammo 110 Grain Polymer Tip Box of 50 $0.71/rd $35.48 In Stock 1d ago 2h ago MidwayUSA
ARMSCOR AMMO 300AAC 147G FMJ 100/12 VALUE PACK 4806015504467 $0.71/rd $70.99 In Stock 5d ago 2h ago Cape Gun Works
Stryker 300 AAC Blackout 220 gr TMJ (Subsonic) - 400 ct. $0.71/rd $284.00 In Stock 87d ago 10m ago The American Marksman
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 127d ago 29m ago BH Ammo
Ammo Inc. Signature, .300 AAC Blackout, FMJ, 150 Grain, 20 Rounds $0.71/rd $14.24 In Stock 6d ago 20m ago Sportsman's Guide
Armscor 300 Blackout 147 Grain FMJ 20 Round Box FAC300AAC-1N $0.71/rd $14.25 In Stock 10d ago 11m ago Gun Buyer
Winchester .300 AAC Blackout 147 gr Full Metal Jacket (FMJ) 20 rounds 020892231030 $0.71/rd $14.26 In Stock 1d ago 2h ago Sentry Ammo
Ruag 300 AAC Blackout Ammunition High Velocity Lead Free 2418110 108 Grain STYX SX Solid Copper Hollow Point 1050 Rounds $0.71/rd $749.99 In Stock 46d ago 3m ago Outdoor Limited
Sellier & Bellot .300 AAC BLACKOUT, 124gr, FMJ - 20 Rounds [MPN: SB300BLKA] 754908512447 $0.72/rd $14.31 In Stock 3d ago 30m ago Firearms Depot
Winchester White Box USA 300 AAC Blackout Ammo 147 Grain Full Metal Jacket Box of 20 020892231030 $0.72/rd $14.39 In Stock 12d ago 2h ago MidwayUSA
Capital Cartridge .300 Blackout 200GR FMJ - SUBSONIC - NEW Brass - 50 Round Box $0.72/rd $35.99 In Stock 4d ago 4m ago 2A Warehouse
Hyperion Munitions HMBX300BLK22050 300 Blackout 220 gr Full Metal Jacket 50 Per Box/10 Case 810108164371 $0.72/rd $35.99 In Stock 2d ago 4m ago GunZoneDeals
Winchester White Box USA 300 AAC Blackout Ammo 125 Grain Jacketed Hollow Point Case of 200 (10 Boxes of 20) 00020892224575 $0.72/rd $143.99 In Stock 12d ago 2h ago MidwayUSA
Ammo Inc. 300 AAC Blackout Ammo - 500 Rounds of 150 Grain FMJ... $0.72/rd $359.99 In Stock 70d ago 40m ago Ammo.com
300 AAC Blackout - 150 Grain FMJ - Ammo Inc. - 500 Rounds 0213202316167 $0.72/rd $360.00 36 19d ago 14m ago Lucky Gunner
WIN USA 300BLK 147GR FMJ 20/10 020892231030 $0.72/rd $14.41 In Stock 2d ago 35m ago Skogen’s Gun Supply
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs 812285021089 $0.72/rd $14.42 In Stock 2d ago 9m ago The Armories
Sellier & Bellot 300BLKA Rifle 300 Blackout 124 gr Full Metal Jacket 20 Bx/ 50 Cs 754908512447 $0.72/rd $14.45 In Stock 2d ago 4m ago Guns 2 Ammo
Sellier & Bellot 300BLK 124 Grain FMJ 20Rd Box $0.72/rd $14.49 In Stock 10d ago 11m ago Gun Buyer
WOLF AMO 300 BLACKOUT 145GR FMJ STEEL CASE 20RD ( 25 BOXES PER CASE ) 645611308673 $0.72/rd $14.49 In Stock 2d ago 47m ago Tombstone Tactical
Winchester .300 AAC BLACKOUT, 147gr, FMJOT - 20 Rounds [MPN: USA300B147] 020892231030 $0.73/rd $14.55 In Stock 3d ago 30m ago Firearms Depot
Armscor FAC300AAC1N Rifle 300 Blackout 147 gr Full Metal Jacket (FMJ) 20 Bx/ 10 Cs 812285021089 $0.73/rd $14.56 In Stock 3d ago 22m ago SHTF Tactical

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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