AR-15 .556 – 7.5" LENGTH 1:7 TWIST W/ 7" SLIM M-LOK HANDGUARD NO Assembly Required With BCG and Charging Handle

This is a complete, ready-to-fire AR-15 upper receiver chambered in .556/.223. It’s designed for shooters who want a compact, no-fuss setup without the hassle of sourcing parts and assembly. The key benefit is that it arrives fully assembled with a Bolt Carrier Group (BCG) and Charging Handle, so you can simply mate it to your AR-15 lower receiver and you’re ready to go. Miami Shooters Supply delivers this quality AR-15 part with fast shipping to get you on the range quicker.

Key Features

• Fully Assembled Upper: Comes complete with BCG and Charging Handle; requires no additional parts or tools for installation.
• Compact 7.5″ Barrel: Provides a highly maneuverable profile ideal for close-quarters or vehicle use.
• 1:7 Twist Rate: Optimally stabilizes both lighter .223 rounds and heavier 62+ grain .556 ammunition.
• 7″ Slim M-LOK Handguard: Offers a modern, lightweight platform for easy attachment of grips, lights, and other accessories directly to the rail.
• Quality Construction: Built with a mil-spec profile barrel and a durable, precision-machined upper receiver for reliable performance.

Built For

This upper is ideal for building a compact, personal defense firearm or a fun, range-ready pistol or SBR configuration. It’s perfect for the shooter who appreciates the convenience of a complete package and the versatility of the M-LOK attachment system for customization.

Specifications

• Caliber: .556 NATO / .223 Remington
• Barrel Length: 7.5 inches
• Barrel Twist Rate: 1:7
• Handguard: 7-inch Slim M-LOK
• Compatibility: Fits any mil-spec AR-15 lower receiver. (Firearm configuration subject to NFA regulations; know your local and state laws.)

FAQ

Is the Bolt Carrier Group (BCG) included?
Yes. This is a complete upper receiver assembly. It includes a mil-spec BCG and charging handle, so no additional purchases are necessary for function.

What is the barrel material?
This upper features a chrome-moly steel barrel with a standard phosphate coating for durability and corrosion resistance, a reliable choice for this category of AR-15 part.