Davidson Defense Foe-Hammer 7.5-inch Pistol-Gas 1:8 300 AR-15 Freefloat Handguard Pistol Upper Build Kit

Foe-Hammer 7.5-inch .300 Blackout AR-15 Upper Build Kit

The Foe-Hammer is built around a 7.5-inch .300 Blackout barrel with an HBAR profile, finished in phosphate, paired with a "Panhead" billet upper receiver. It pairs a 7-inch MFFAR7 smooth free-float handguard with an AR-15 birdcage flash hider at the muzzle, running on a pistol-length gas system. BCG and charging handle are not included, leaving the buyer to supply those components separately.

Key Features

• 7.5-inch .300 Blackout barrel, 1:8 twist, HBAR profile, phosphate finish
• Pistol-length gas system with micro low-profile steel gas block
• "Panhead" billet upper receiver, NOFA configuration
• .458-style ejection port opening
• MFFAR7 7-inch smooth free-float handguard
• AR-15 birdcage flash hider
• BCG and charging handle are not included.

Barrel and Gas System

The barrel runs 7.5 inches long, chambered in .300 Blackout and finished in phosphate with an HBAR profile. It carries a 1:8 twist rate and a 5/8x24 muzzle thread. Gas cycles back to the action through a pistol-length system, running a pistol-length gas tube and a micro low-profile steel gas block sized to a .750-inch journal.

Upper Receiver and Handguard

The upper receiver is a "Panhead" billet unit finished in black, built in a NOFA configuration and featuring a .458-style ejection port opening. The ejection port carries a standard .223/5.56 door with its rod and spring installed. Over the barrel sits a 7-inch MFFAR7 handguard, a smooth free-float design.

Muzzle Device

Capping the muzzle is an AR-15 birdcage flash hider, threaded to match the barrel's 5/8x24 pattern and secured with the included 5/8-inch black crush washer.

Follow all manufacturer instructions and safe handling practices.

Ensure compliance with all applicable federal, state, and local laws.

BCG and charging handle are not included.