.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. READ MORE
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- Muzzle Devices - .300 Blackout (47)
- Bolt Carrier Groups - 300 Blackout (24)
- Magazines - .300 Blackout (20)
- Barrels - .300 Blackout (16)
- 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)
Brand
Color
- Black - .300 Blackout (63)
- .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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St. Patty's Sale
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... -
St. Patty's Sale
Lancer L5 Advanced Warfighter 30 Round .300 BLK AR-15 Magazine
.300 Blackout Polymer and Steel Hybrid Magazine Lancer's .300 Blackout specific L5AWM magazine features optimized internal geometry to feed a .30 caliber cartridge. The hardened steel feed lips wrap around... -
St. Patty's Sale
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... -
AT3™St. Patty's 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™St. Patty's 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™St. Patty's 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... -
St. Patty's Sale
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... -
RECOMMENDEDSt. Patty's Sale
KAK Industry K-SPEC Downward Venting 5.56 BCG with Dual Ejector Bolt
KAK Industry K-SPEC Downward Venting 5.56 BCG with Dual Ejector Bolt The K-SPEC Enhanced AR15 BCG is a high-quality bolt carrier group designed for use with both 5.56 and 300... -
AT3™St. Patty's 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... -
St. Patty's Sale
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... -
St. Patty's Sale
Surefire WARCOMP AR-10 Flash Hider/Compensator for 7.62 – 5/8×24 Thread
Surefire WARCOMP for .300 BLK and .308 WIN The Surefire WARCOMP for 7.62 calibers makes a great suppressor mount for .308 AR-10 type rifles, or .300 Blackout AR-15s. This hybrid... -
AT3™St. Patty's 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™St. Patty's 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... -
St. Patty's Sale
Phase 5 Weapon Systems FATman Hex Brake 7.62 for AR-10
The Fat Muzzle Brake For 7.62 Rifles The Phase 5 Weapon Systems FATman Hex Brake 7.62 is an outstanding addition to AR-10 builds that solve common issues faced by many... -
St. Patty's Sale
Surefire SOCOM AR-10 Flash Hider for 7.62 – 5/8×24 Thread
Surefire SOCOM AR-10 Flash Hider for 7.62 - 5/8x24 Thread Flash hiders reduce your firearm's flash and concussion and the Surefire SOCOM 3-Prong Flash Hider is one of the best... -
St. Patty's Sale
Phase 5 Weapon Systems M16 Cut Bolt Carrier Group for AR-15 – .223/5.56 NATO
Upgrade Your AR15 with the Best Black Phosphate BCG from Phase 5 Tactical The Phase 5 Weapon Systems M16 Cut Bolt Carrier Group is a high-quality upgrade designed for M16/M4/AR-15... -
St. Patty's Sale
Rise Armament Black Nitride AR-15 Bolt Carrier Group
Rise Armament Black Nitride AR-15 Bolt Carrier Group RISE Armament has produced an exceptional AR-15 Bolt Carrier Group (BCG) that is manufactured with the utmost precision and care. Each BCG... -
St. Patty's Sale
Surefire Three Prong AR-10 Flash Hider for 7.62 – 5/8×24 Thread
Surefire Eliminator Three Prong .30CAL Flash Hider Eliminate all flash with the Surefire Eliminator Three Prong Flash Hider, perfect for .300 Blackout, .308, and any other 7.62 caliber rifles. Surefire... -
St. Patty's Sale
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 -
St. Patty's Sale
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 -
Backup Tactical Rifle Thread Protector – Honeycomb – Black
Backup Tactical Honeycomb Rifle Thread Protectors Add sleek protection to your modern sporting rifle with Backup Tactical’s honeycomb thread caps. CNC machined from durable aluminum, these covers shield exposed muzzle...2 Options2 Options2 Options -
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
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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