Davidson Defense Attuned w/SBA3 Brace 10.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat Quad-Rail Handguard Pistol Full Build Kit

Davidson Defense Attuned 10.5-inch 5.56 NATO AR-15 Pistol Full Build Kit with SBA3 Brace and Quad-Rail Handguard

The Davidson Defense Attuned Full Build Kit provides all components needed to complete an AR-15 pistol chambered in 5.56 NATO. This kit features a 10.5-inch barrel with carbine-length gas system, 10-inch free-float quad-rail handguard, complete bolt carrier group, charging handle, SB Tactical SBA3 adjustable stabilizing brace, buffer system, and lower parts kit. The upper assembly pairs a 7075-T6 aluminum receiver with a 4150 CrMoV steel barrel.

Key Features

• 10.5-inch 4150 CrMoV steel barrel, government profile, 1:7 twist rate, phosphate finish
• Carbine-length gas system with micro low-profile steel gas block
• 10-inch free-float quad-rail handguard, 6061-T6 aluminum, black finish
• Complete bolt carrier group, 9310 alloy steel with nitride finish
• AR-15 upper receiver, 7075-T6 aluminum with M4 feed ramps, anodized finish
• Mil-spec AR-15 charging handle
• TPI GI A2 birdcage flash hider, 1/2x28 threading
• SB Tactical SBA3 adjustable pistol stabilizing brace, black
• Mil-spec heavy-duty 6-position buffer tube with 3 oz carbine buffer and recoil spring
• Mil-spec lower parts kit with castle nut and end plate

Perfect For

• Builders completing compact AR-15 pistol platforms
• Shooters requiring shorter 5.56 NATO configurations
• Applications where quad-rail accessory mounting is preferred
• Users seeking complete component packages with adjustable brace

Barrel and Gas System

The 10.5-inch government profile barrel is manufactured from 4150 chrome moly vanadium steel with a phosphate finish. The 1:7 twist rate stabilizes projectiles across common 5.56 NATO and .223 Remington grain weights. Carbine-length gas system timing with micro low-profile gas block supports cycling with standard ammunition.

Upper Assembly and Handguard

The upper receiver features M4 feed ramps and 7075-T6 aluminum construction with anodized finish. The 10-inch quad-rail handguard provides four continuous Picatinny rail sections for mounting lights, grips, lasers, and other accessories. Free-float attachment isolates barrel harmonics from handguard contact.

Bolt Carrier Group and Buffer System

The complete bolt carrier group features 9310 alloy steel construction with nitride finish for corrosion resistance and reduced friction. The mil-spec buffer system includes a heavy-duty 6-position buffer tube, 3 oz carbine buffer, standard recoil spring, castle nut, and end plate.

SBA3 Adjustable Brace

The SB Tactical SBA3 adjustable pistol stabilizing brace attaches to the included buffer tube assembly. This component provides five length-of-pull positions for varied shooting stances and improved control during use.

Lower receiver not included. Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.