Davidson Defense Mutton Chops w/Gauntlet Arms Brace 10.5-inch 1:10 9MM AR-9 Freefloat Keymod Handguard Pistol Full Build Kit

Davidson Defense Mutton Chops Gauntlet Arms Brace 10.5-inch 9mm AR-9 Freefloat Keymod Pistol Full Build Kit

The Davidson Defense Mutton Chops is a 9mm AR-9 Full Build Kit built around a compact 10.5-inch platform. The kit centers on a Bear Creek 10.5-inch steel 9mm barrel with a black nitride finish, 1:10 twist rate, and 1/2x36 thread pitch, paired with a 9mm A2 birdcage flash hider and a crush washer. The upper receiver is 7075-T6 aluminum with a black anodized finish, M4 feed ramps, an AR-15 ejection port door assembly, and a forward assist assembly, paired with a 10-inch ultra-slim freefloat Keymod rail handguard with a full-length top Picatinny rail. A 9mm nitride bolt carrier group in 8620 alloy steel with an external extractor, compatible with Glock and Colt pattern magazines, and a Mil-Spec AR-15 M4 charging handle complete the upper side. The lower hardware includes a complete Mil-Spec AR-15 lower parts kit, a heavy-duty pistol buffer tube, an AR-15 9mm carbine buffer, a standard AR-15 carbine recoil spring, an AR-15 M16 Mil-Spec receiver end plate, and an AR-15 carbine castle nut. The Gauntlet Arms polymer stabilizing brace in black is included. Lower receiver not included.

Key Features

• Bear Creek 10.5-inch steel 9mm barrel, black nitride finish, 1:10 twist, 1/2x36 thread pitch
• 9mm A2 birdcage flash hider, 1/2x36, crush washer included
• 7075-T6 aluminum upper receiver, black anodized, M4 feed ramps, ejection port door assembly, forward assist assembly
• 10-inch ultra-slim freefloat Keymod handguard, full-length top Picatinny rail, Keymod accessory mounting, slim profile
• 9mm nitride bolt carrier group, 8620 alloy steel, external extractor, Glock and Colt pattern magazine compatible
• Mil-Spec AR-15 M4 charging handle
• Complete Mil-Spec AR-15 lower parts kit
• Heavy-duty pistol buffer tube
• AR-15 9mm carbine buffer
• Standard AR-15 carbine recoil spring
• AR-15 M16 Mil-Spec receiver end plate
• AR-15 carbine castle nut
• Gauntlet Arms polymer stabilizing brace, black

Perfect For

• Builders sourcing a complete 9mm AR-9 pistol kit with a Bear Creek barrel, Gauntlet Arms brace, and lower parts kit already included, pairing it with their own lower receiver
• Shooters building a compact 10.5-inch 9mm platform who want Glock and Colt magazine compatibility and a full-length Picatinny rail covered in one kit
• AR-9 builders who want a freefloat Keymod handguard and 9mm nitride BCG with a polymer stabilizing brace included without sourcing components separately

Bear Creek Barrel and Muzzle Device

The Bear Creek barrel is 10.5 inches, chambered in 9mm, constructed from steel with a black nitride finish and a 1:10 twist rate. The thread pitch is 1/2x36, which matches the included 9mm A2 birdcage flash hider. A crush washer is included with the muzzle device. At 10.5 inches this barrel keeps the overall platform compact while covering the front end from muzzle device to upper receiver.

Upper Receiver and Handguard

The upper receiver is 7075-T6 aluminum with a black anodized finish, M4 feed ramps, an AR-15 ejection port door assembly, and a forward assist assembly. The 10-inch ultra-slim freefloat Keymod handguard features a full-length top Picatinny rail and Keymod accessory mounting slots along the body in a slim profile design. These two components define the exterior structure of the upper assembly on this AR-9 platform.

9mm Bolt Carrier Group and Charging Handle

The 9mm nitride bolt carrier group is 8620 alloy steel with an external extractor, compatible with both Glock and Colt pattern magazines. A Mil-Spec AR-15 M4 charging handle is included to complete the upper component set.

Lower Parts Kit and Buffer System

The complete Mil-Spec AR-15 lower parts kit covers the internal lower receiver components. The buffer system includes a heavy-duty pistol buffer tube, an AR-15 9mm carbine buffer, a standard AR-15 carbine recoil spring, an AR-15 M16 Mil-Spec receiver end plate, and an AR-15 carbine castle nut. The Gauntlet Arms polymer stabilizing brace in black rounds out the kit, providing a rear interface for the pistol platform.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included. Verify local and state laws regarding pistot brace use and classification.