Davidson Defense Hammerfall w/SBA3 Brace 11.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat Tubular M-Lok Handguard Pistol Full Build Kit

Hammerfall with SB Tactical SBA3 Brace 11.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Tubular M-Lok Pistol Full Build Kit

The Hammerfall with SB Tactical SBA3 Brace 11.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Tubular M-Lok Pistol Full Build Kit from Davidson Defense is a pistol-format full build kit chambered in 5.56 NATO. The kit includes an 11.5-inch government-profile barrel, a freefloat tubular M-Lok handguard, a 7075-T6 anodized upper receiver, a micro low-profile gas block, a carbine-length stainless steel gas tube, a GI birdcage flash hider, a complete bolt carrier group, a mil-spec charging handle, a lower parts kit, a mil-spec 6-position heavy-duty buffer tube, buffer, recoil spring, end plate, castle nut, and an SB Tactical SBA3 adjustable pistol stabilizing brace. The lower receiver is not included.

Key Features

• 11.5-inch 4150 CrMoV government-profile barrel in 5.56 NATO with 1:7 twist rate
• Phosphate barrel finish
• 1/2x28 muzzle thread pitch
• Carbine-length gas system with micro low-profile .750 O.D. gas block
• Carbine-length stainless steel gas tube
• GI birdcage flash hider, 1/2x28 TPI
• Freefloat tubular M-Lok aluminum handguard
• 7075-T6 anodized aluminum upper receiver with M4 feed ramps
• 9310 alloy steel bolt carrier group with nitride finish
• Mil-spec AR-15 M4 charging handle
• Mil-spec heavy-duty 6-position buffer tube with 3 oz buffer weight
• Lower parts kit, recoil spring, end plate, and castle nut included
• SB Tactical SBA3 adjustable pistol stabilizing brace

Perfect For

• Builders seeking a complete 5.56 NATO pistol-format kit with brace included
• Shooters looking for a carbine-gas AR-15 pistol build with all primary components
• Builders prioritizing a freefloat tubular M-Lok handguard platform
• Those wanting a ready-to-complete pistol kit with an adjustable stabilizing brace

Barrel and Gas System

The 11.5-inch barrel is chambered in 5.56 NATO and constructed from 4150 CrMoV steel with a government profile and a 1:7 twist rate. The phosphate finish covers the full barrel surface in a matte black corrosion-resistant coat. The muzzle is threaded 1/2x28 and includes a GI birdcage flash hider. The carbine-length gas system includes a stainless steel gas tube and pairs with a micro low-profile gas block at .750 O.D., a separate component positioned beneath the handguard on the barrel.

Upper Receiver and Handguard

The upper receiver is machined from 7075-T6 aluminum with an anodized finish and M4 feed ramp compatibility. The freefloat tubular M-Lok handguard is aluminum and provides M-Lok slot access along its length for accessory mounting without contact with the barrel or gas system components.

Bolt Carrier Group and Charging Handle

The complete bolt carrier group uses a 9310 alloy steel bolt with a nitride finish, compatible with 5.56, .223, .300 Blackout, and .350 Legend configurations. The included mil-spec AR-15 M4 charging handle meets mil-spec dimensional standards for use with the upper receiver included in this kit.

SB Tactical SBA3 Stabilizing Brace

The SB Tactical SBA3 adjustable pistol stabilizing brace is included as the brace component for this pistol-format full build kit. The SBA3 is an adjustable brace with a 6-position design compatible with the mil-spec heavy-duty buffer tube included in this kit. It is black in finish and constructed for use on AR-15 pistol-format configurations.

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