Davidson Defense Lockjaw 7.5-inch 1:16 10MM AR-15 Freefloat Tubular Handguard Pistol Upper Build Kit

Lockjaw 7.5-inch 1:16 10mm AR-15 Freefloat Tubular Handguard Pistol Upper Build Kit

The Lockjaw is a 10mm AR-15 pistol caliber Upper Build Kit built around a 7.5-inch platform. The kit centers on a 7.5-inch M4 contour barrel in 4150 CMV steel with a Parkerized finish, 1:16 twist rate, and 9/16x24 thread pitch, paired with a 10mm and .40 S&W compatible A2 birdcage flash hider in black and a black 5/8-inch crush washer. The upper receiver is a 6061 billet PCC upper receiver in 6061 aluminum, paired with a 7-inch MFFAR7 smooth freefloat handguard in black aluminum with a slim smooth profile and Picatinny top rail. BCG and charging handle are not included.

Key Features

• 7.5-inch M4 contour barrel, 4150 CMV steel, Parkerized finish, 1:16 twist, 9/16x24 thread pitch
• A2 birdcage flash hider, black, 10mm and .40 S&W compatible, black 5/8-inch crush washer included
• 6061 billet PCC upper receiver, 6061 aluminum
• MFFAR7 7-inch smooth freefloat handguard, black aluminum, slim smooth profile, Picatinny top rail
• BCG and charging handle not included

Perfect For

• Builders sourcing a complete 10mm AR-15 pistol upper build kit with a billet PCC upper receiver and slim freefloat smooth handguard, pairing it with their own bolt carrier group and charging handle
• Shooters building a compact 7.5-inch 10mm pistol caliber platform who prefer to select their own BCG while having the Parkerized barrel and billet PCC upper covered in one kit
• AR-15 10mm builders who want a 7-inch slim smooth freefloat handguard with a Picatinny top rail on a dedicated PCC billet upper without sourcing components separately

Barrel and Muzzle Device

The 7.5-inch M4 contour barrel is chambered in 10mm and constructed from 4150 CMV steel with a Parkerized finish. The twist rate is 1:16 and the thread pitch is 9/16x24, which matches the included A2 birdcage flash hider compatible with 10mm and .40 S&W. A black 5/8-inch crush washer is included with the muzzle device.

Billet PCC Upper Receiver and Handguard

The 6061 billet PCC upper receiver is 6061 aluminum, purpose-built around the AR-15 pistol caliber platform. The MFFAR7 7-inch smooth freefloat handguard is black aluminum with a slim smooth exterior profile and a Picatinny top rail for optic and accessory mounting. These two components define the exterior structure of the upper assembly on this 10mm platform.

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