The Aero Precision AR15 Barreled Upper, 16-inch 5.56 M4 carbine barrel with a pinned front sight base and M4-style handguard (Aero Precision part no. APAR505621), gives builders a complete, ready-to-run upper without the assembly work of sourcing individual components. The 16-inch chrome-moly-vanadium carbine-length barrel carries a 1:7 twist rate suited to a wide range of 5.56 bullet weights, and a matte black finish matches standard AR-platform hardware. A carbine-length gas system and standard A2 flash hider round out a proven, mil-spec configuration. This barreled upper does not include a bolt carrier group or charging handle.

Key Specifications

• Chambered for .223 Remington/5.56 NATO, the standard AR-15 cartridge family.
• Barrel length is 16 inches, with a 1:7 twist rate.
• Includes a pinned front sight base (FSB) and standard M4-style handguard.
• Uses a carbine-length gas system matched to the 16-inch barrel.
• Muzzle device is a standard A2 flash hider.
• Finish is matte black, and the upper ships fully assembled.
• Does not include a bolt carrier group or charging handle.

Frequently Asked Questions

Does this upper include a BCG and charging handle? No, this barreled upper ships without a bolt carrier group or charging handle, both of which need to be purchased separately.

What twist rate does this barrel use? It uses a 1:7 twist rate, suited to a wide range of common 5.56 bullet weights.

Buy the Aero Precision AR15 Barreled Upper, 16in 5.56 M4 Carbine

Drop a complete, ready-to-run upper onto your build without sourcing individual parts. Aero Precision assembles this upper to a proven mil-spec configuration. Order it from our Lubbock, Texas gun shop and browse our full AR15 uppers selection for fast, direct shipping.