If you’re looking for a complete, ready-to-shoot upper receiver for your AR-15 platform, this 16″ 300 Blackout build is the straightforward solution. Designed for shooters who want a versatile rifle capable of handling both supersonic and subsonic ammunition, this upper comes fully assembled with a Bolt Carrier Group and Charging Handle. From Miami Shooters Supply, you get a functional, no-fuss component that ships fast and requires zero gunsmithing to get you on the range.
Key Features
- Complete, ready-to-install upper receiver assembly; no tools or assembly required.
- Includes a properly headspaced Bolt Carrier Group (BCG) and a mil-spec charging handle.
- 16-inch barrel with a 1:7 twist rate, optimized for stabilizing a wide range of 300 BLK bullet weights.
- 15-inch slim-profile M-LOK handguard provides a secure grip and ample space for accessories.
- Chambered in 300 AAC Blackout, ideal for hunting, home defense, or suppressed shooting.
Built For
This upper is perfect for the AR-15 owner building a dedicated 300 Blackout rifle or converting an existing 5.56 lower. It’s an excellent choice for hunters pursuing medium game, shooters interested in running a suppressor, or anyone who wants a hard-hitting, short-to-medium range package without the complexity of a custom build.
Specifications
- Caliber: 300 AAC Blackout (300 BLK)
- Barrel: 16″ Length, 1:7 Twist Rate, likely 4150 Chrome Moly or similar steel
- Handguard: 15″ Slim M-LOK Aluminum Free-Float Tube
- Compatibility: Fits standard AR-15/M16/M4 pattern lower receivers
- Finish: Standard Black Anodized (Assumed)
FAQ
Is the Bolt Carrier Group included?
Yes. This is a complete AR-15 upper assembly that includes a BCG and charging handle, so you only need to mate it with a lower receiver to have a functioning firearm.
Can I use my existing 5.56 magazines?
Yes. The 300 Blackout round utilizes standard 5.56/.223 PMAGs and metal magazines without modification, though it is highly recommended to clearly label them for safety.
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