.300 Blackout AR-15 Parts - Barrels, Muzzle Brakes, and More
If you’re looking for a harder-hitting cartridge for your AR-15, .300 Blackout is the go-to. This was designed to have performance similar to 7.62×39, without needing a bunch proprietary parts.
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- Muzzle Devices - .300 Blackout (48)
- Bolt Carrier Groups - 300 Blackout (24)
- Magazines - .300 Blackout (20)
- Barrels - .300 Blackout (19)
- Lower Receivers - .300 Blackout (10)
- Uppers & Parts - .300 Blackout (5)
- Buffer Tube Parts - .300 Blackout (5)
- Triggers - .300 Blackout (4)
- AR-15 Build Kits and Assemblies - .300 Blackout (3)
- Complete Uppers - .300 Blackout (3)
- Charging Handles - 300 Blackout (2)
- Lower Receiver Parts - .300 Blackout (1)
- All Other Products - .300 Blackout (1)
- Tools & Cleaning - .300 Blackout (1)
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Color
- Black - .300 Blackout (67)
- .300 Blackout - OD Green (14)
- Flat Dark Earth - 300 Blackout (11)
- Stainless - .300 Blackout (8)
- Gray - .300 Blackout (8)
- Pink - .300 Blackout (5)
- Tan - .300 Blackout (5)
- Red - .300 Blackout (3)
- Burnt Bronze - .300 Blackout (3)
- Titanium - .300 Blackout (3)
- Tungsten - .300 Blackout (3)
- Translucent Smoke - .300 Blackout (2)
- Blue - .300 Blackout (1)
- Ranger Green - .300 Blackout (1)
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AT3™RECOMMENDEDSale!
AT3™ AR-15 Bolt Carrier Group (BCG) – 5.56 NATO/.300 Blackout – Black Nitride
AT3 Tactical is bringing you the best with this Top-Tier Black Nitride Bolt Carrier Group Getting a high quality bolt carrier group (BCG) that runs well in your rifle is... -
AT3™Sale!
AT3™ 5/8 Inch Crush Washer for .308/7.62 Muzzle Devices
Ensure Proper Timing on Your .30 Caliber Muzzle Device Crush washers are essential to replace after removing for replacing a muzzle device. Re-using crush washers can lead to muzzle devices... -
AT3™Sale!
AT3™ .300 BLK/.308 WIN Birdcage Flash Hider with Crush Washer
Classic Birdcage Flash Hider, Sized up for .30 Caliber Limits muzzle flash for effective use in all light conditions. This device is threaded 5/8x24 for applications on .300 Blackout AR15s... -
AT3™Sale!
AT3™ AR-15 Replacement Bolt – 5.56 NATO/.300 Blackout – Black Nitride
AT3 Replacement AR-15 Bolt This AR-15 replacement bolt from AT3 Tactical easily replaces a broken bolt in your rifle. This bolt comes complete with extractor and ejector assemblies already installed... -
AT3™Sale!
AT3™ AR-15 3-Port Muzzle Brake with Crush Washer – 5/8×24 Thread for .300 BLK/.308...
.30 Cal AR15? Not a problem with this aggressive Muzzle Brake/Compensator With greater caliber comes greater recoil - whether you're shooting a .300 BLK AR15 or a .308 WIN AR10,... -
AT3™Sale!
AT3™ 300 Blackout Medium Profile 14.5 Inch AR-15 Barrel
14.5 Inch .300 Blackout Barrel by AT3 Tactical This 14.5-inch .300 Blackout Barrel makes a great choice for your short, heavy-hitting pistol or SBR AR-15 builds. Made from 4150 CMV...$130.00Only$110.50 -
AT3™Sale!
AT3™ 300 Blackout Medium Profile 7.5 Inch AR-15 Barrel
7.5 Inch .300 Blackout Barrel by AT3 Tactical This 7.5-inch .300 Blackout Barrel makes a great choice for your short, heavy-hitting pistol or SBR AR-15 builds. Made from 4150 CMV...$105.00Only$89.25 -
AT3™Sale!
AT3™ 300 Blackout Medium Profile 6 Inch AR-15 Barrel
6 Inch .300 Blackout Barrel by AT3 Tactical This 6-inch .300 Blackout Barrel makes a great choice for your short, heavy-hitting pistol or SBR AR-15 builds. Made from 4150 CMV...$100.00Only$85.00 -
10% Off!
Strike Industries JCOMP Gen 2 for .308/7.62 Rifles – 5/8×24
Hybrid .30 Caliber Compensator/Flash Hider The JCOMP Gen 2 is a great design made perfect by Strike Industries, now in .30 cal variety. This hybrid muzzle device tames recoil and... -
AT3™Sale!
AT3™ AR-15 Bolt Carrier Group – 5.56 NATO/.300 Blackout – Nickel Boron
Get the Performance You Need with a Nickel Boron Bolt Carrier Group Whether you're starting a fresh build or upgrading from stock, a bolt carrier group that performs reliably is... -
10% Off!
Strike Industries King Comp for .308/7.62 Rifles – 5/8×24
The Perfect Hybrid of Compensator, Flash Hider, & Muzzle Brake For .308/7.62 Platforms The Strike Industries King Comp is an exceptional addition to .308 and .300 Blackout builds to significantly... -
AT3™Sale!
AT3™ .300 Blackout Medium Profile 10.5 Inch AR-15 Barrel
10.5 Inch .300 Blackout Barrel by AT3 Tactical This 10.5 Inch .300 Blackout Barrel makes a great choice for your short, heavy-hitting pistol or SBR AR-15 builds. Made from 4150...$112.50Only$95.63 -
AT3™Sale!
AT3™ .300 Blackout Medium Profile 16 Inch AR-15 Barrel
16 Inch .300 Blackout Barrel by AT3 Tactical A 16 inch .300 Blackout barrel makes swapping to a heavier hitting cartridge in your favorite rifle simple. This 4150 CMV barrel... -
AT3™Sale!
AT3 Upper Receiver Black + AT3 Bolt Carrier Group + Breek Arms Warhammer Charging...
Complete your Next Build with AT3's Top-Selling Billet Upper Receiver and BCG plus the Trusted Breek Arms Warhammer Charging Handle Save by bundling vs purchasing the parts individually, plus free...$249.99Only$212.49 -
AT3™Sale!
AT3™ Black Nitride 5.56 Bolt Carrier Group with Breek Arms Warhammer AR-15 Charging Handle
AT3 Black Nitride BCG + Breek Warhammer AR-15 Charging Handle The AT3 Tactical BCG and Breek Warhammer Charging Handle pair perfectly to complete your AR-15 upper receiver. Save on this...8 Options -
Magpul Cerakote 30 Round PMAGs – FDE, ODG, and Pink Coated by AT3
Flat Dark Earth PMAGs and More - Cerakote by AT3 Our customers have been asking for years about Magpul Flat Dark Earth PMAGs, and other colors Magpul discontinued. Now, they're...3 Options -
RECOMMENDED
Armaspec Stealth Recoil Spring (SRS) for AR-15 and AR-10
Reduce Recoil, Wear, and Unwanted Rattling Armaspec's Stealth Recoil Spring™ is one of the best upgrades for your AR15 or AR10 recoil system, and you can feel and hear the...8 Options -
Hera H1 Gen 2 10 Round AR-15 Magazine
Hera USA H1 Gen 2 10 Round AR15 Magazine Made in Germany with high-impact grade polymer, the Hera H1 10 round magazine is a reliable choice to carry your ammo....3 Options -
Mission First Tactical Extreme Duty 30-Round AR 15 Magazine – .223 / 5.56 NATO...
Designed for Ergonomics and Maximum Reliability Mission First Tactical Offers a new and improved polymer in their Extreme Duty Polymer Magazine. Next-generation long glass fiber polymer is used in a...2 Options -
Magpul PMAG M3 30 Round Magazine 300BLK – MAG800-BLK
Purpose-Designed Magazine For Rifles Chambered In 300 Blackout The Magpul PMAG M3 300BLK is a next-generation 30-round magazine chambered in 300 AAC Blackout for AR15/M4 compatible weapons. Along with an... -
Duramag Speed AR-15 20 Round Aluminum Magazine – .223/5.56 NATO
20 Round Curved Duramag with Anti-Tilt Follower The Duramag Speed 20 Round Aluminum Magazines follow the curve of full 30 round magazines. This allows these compact magazines to use full...9 Options -
Armaspec Sound Mitigation Buffer (SMB) Captured Gen 3 – Multiple Buffer Weights Available
Improved & Easy-To-Install Captive Buffer Weights For AR Builds The Armaspec Sound Mitigation Buffer (SMB) Captured Gen 3 is a quick and easy replacement for your standard buffer and spring....6 Options -
Hera H3 Gen 2 30 Round AR-15 Magazine
Hera H3 Gen 2 30 Round AR-15 Magazine Made in Germany with high-impact grade polymer, the Hera H3 30 round magazine is a reliable choice to carry your ammo. Compatible...3 Options -
Magpul PMAG M3 20 Round Magazine – .300 BLK – MAG1182
Highly Reliable 20-Round Magazine Designed Specifically for 300 BLK Rifles The Magpul PMAG M3 20 Round - MAG1182 is a dedicated and highly reliable polymer magazine designed specifically for rifles...
If you’re looking for a harder-hitting cartridge for your AR-15, .300 Blackout is the go-to. This was designed to have performance similar to 7.62×39, without needing a bunch proprietary parts.
You can use the same bolt carrier group and magazines as your traditional AR-15 – the only real difference is a barrel for the .30 caliber bullet. Beyond that, you can use all your favorite AR receivers and accessories to shoot this caliber.
.300 Blackout also suppresses rounds beautifully, and is ideal to be used for a short barreled-build.
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