Davidson Defense Hammerfall 11.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat Tubular M-Lok Handguard Pistol Upper Build Kit

Hammerfall 11.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Tubular M-Lok Pistol Upper Build Kit

The Hammerfall 11.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Tubular M-Lok Pistol Upper Build Kit from Davidson Defense is an upper build kit for the AR-15 platform 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, and a GI birdcage flash hider. BCG and charging handle are 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
• GI birdcage flash hider, 1/2x28 TPI, manganese phosphate finish
• Freefloat tubular M-Lok aluminum handguard
• 7075-T6 anodized aluminum upper receiver with M4 feed ramps
• BCG and charging handle not included

Perfect For

• Builders completing an AR-15 pistol upper in 5.56 NATO
• Shooters sourcing their own bolt carrier group and charging handle
• Builders prioritizing a freefloat tubular M-Lok handguard platform
• Those working within the AR-15 carbine-gas configuration

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 with a manganese phosphate finish. The carbine-length gas system 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.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. BCG and charging handle are not included.