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

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

The Hammerfall 11.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Tubular M-Lok Pistol Complete Upper from Davidson Defense is a complete upper 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, a stainless steel gas tube, a GI birdcage flash hider, a complete bolt carrier group, and a mil-spec charging handle.

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
• 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

Perfect For

• Builders completing an AR-15 pistol configuration in 5.56 NATO
• Shooters sourcing a complete upper with bolt carrier group and charging handle included
• 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. 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 configuration.

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