Davidson Defense Attuned 10.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat Quad-Rail Handguard Pistol Complete Upper Build

Attuned 10.5-Inch 5.56 NATO AR-15 Complete Upper with Carbine Gas and Quad-Rail Handguard

The Attuned 10.5-Inch 5.56 NATO AR-15 Complete Upper includes an upper assembly, bolt carrier group, and charging handle. The 10.5-inch barrel features 4150 CrMoV construction with phosphate finish, government profile, and 1:7 twist rate. The upper assembly includes a 7075-T6 aluminum upper receiver with M4 feed ramps and anodized finish, 10-inch free-float quad-rail handguard constructed from 6061-T6 aluminum, micro low-profile gas block, and A2-style birdcage flash hider. The nitride-finished BCG is constructed from 9310 alloy steel and includes a mil-spec M4 charging handle.

Key Features

• 10.5-inch barrel, 4150 CrMoV steel, phosphate finish, 1:7 twist rate
• Government profile barrel with carbine-length gas system
• 7075-T6 aluminum upper receiver with M4 feed ramps, anodized finish
• 10-inch free-float quad-rail handguard, 6061-T6 aluminum construction
• Nitride-finished BCG, 9310 alloy steel construction
• Mil-spec M4 charging handle included
• A2-style birdcage flash hider, 1/2x28 thread pitch
• Micro low-profile steel gas block, 0.750-inch diameter

Perfect For

• Builders assembling compact AR-15 pistol or SBR configurations
• Shooters seeking complete uppers with BCG and charging handle included
• Users prioritizing quad-rail Picatinny accessory mounting
• Those requiring M4 feed ramps for improved feeding reliability

Carbine Gas System Configuration

The 10.5-inch barrel pairs with a carbine-length gas system, providing increased gas port dwell time compared to pistol-length systems at this barrel length. The micro low-profile steel gas block measures 0.750 inches in diameter and sits beneath the quad-rail handguard. The carbine gas system length offers compatibility with standard carbine-length gas tubes.

Free-Float Quad-Rail Handguard

The 10-inch free-float quad-rail handguard features 6061-T6 aluminum construction and provides four full-length Picatinny rail surfaces for accessory mounting. The handguard extends to near-muzzle length on the 10.5-inch barrel configuration and offers free-float mounting to the upper receiver. The quad-rail design accepts standard Picatinny-compatible accessories including lights, lasers, grips, and rail covers.

Complete BCG and Charging Handle

The complete bolt carrier group features 9310 alloy steel construction with nitride finish and includes bolt, carrier, cam pin, firing pin, and retaining pin. The BCG provides compatibility with 5.56 NATO, .223, .300 Blackout, and .350 Legend chamberings. The mil-spec M4 charging handle offers standard AR-15 compatibility and T-handle configuration.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.