Davidson Defense Attuned 10.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat Quad-Rail Handguard Pistol Full Build Kit, SBR Ready

Attuned 10.5-Inch 5.56 NATO AR-15 SBR Ready Full Build Kit with Quad-Rail Handguard

The Attuned 10.5-Inch 5.56 NATO AR-15 SBR Ready Full Build Kit includes an upper assembly, bolt carrier group, charging handle, buffer tube, buffer, recoil spring, castle nut, end plate, and lower parts kit. 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. This configuration ships without a brace. Lower receiver not included.

Key Features

• SBR Ready configuration, ships without a brace
• 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 heavy-duty 6-position buffer tube with standard carbine buffer
• Complete lower parts kit included
• A2-style birdcage flash hider, 1/2x28 thread pitch

Perfect For

• Builders preparing SBR configurations who select their own final setup
• Shooters seeking full build kits without a brace included
• Users prioritizing quad-rail Picatinny accessory mounting
• Those requiring all components except the lower receiver and brace for a complete build

SBR Ready Configuration

This SBR Ready full build kit ships without a brace, allowing builders to select their own final configuration. The included mil-spec heavy-duty 6-position buffer tube accepts standard AR-15 carbine buffer systems and provides compatibility with braces or stocks based on the builder's intended setup. The buffer tube includes a 3-ounce standard carbine buffer, recoil spring, castle nut, and phosphate-finished end plate.

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.

Lower receiver not included. Ships without a brace. Do not install a stock unless compliant with applicable laws. Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.