Davidson Defense Mutton Chops 10.5-inch Pistol-Gas 1:8 .300 BLK AR-15 Freefloat Keymod Handguard Pistol Upper Build Kit

Mutton Chops 10.5-inch Pistol-Gas 1:8 .300 BLK AR-15 Freefloat Keymod Pistol Upper Build Kit

The Mutton Chops is a .300 AAC Blackout AR-15 Upper Build Kit built around a compact 10.5-inch pistol-length gas platform. The kit centers on a 10.5-inch HBAR profile parkerized barrel with a 1:8 twist rate and 5/8x24 thread pitch, paired with a GI birdcage flash hider compatible with .308 Winchester, 7.62x39, and .300 AAC Blackout, and a black crush washer. A micro low-profile steel gas block at 0.750 diameter and a pistol-length stainless steel gas tube are included on the front end. The 7075-T6 aluminum anodized upper receiver features M4 feed ramps, an ejection port door with rod and spring, and a forward assist assembly, paired with a 10-inch ultra-slim freefloat Keymod handguard in aluminum. BCG and charging handle are not included.

Key Features

• 10.5-inch HBAR profile parkerized barrel, 1:8 twist, 5/8x24 thread pitch, .300 AAC Blackout
• Pistol-length gas system
• Pistol-length stainless steel gas tube
• Micro low-profile steel gas block, 0.750
• GI birdcage flash hider, 5/8x24, .308 Winchester and 7.62x39 and .300 AAC Blackout compatible, black crush washer included
• 7075-T6 aluminum upper receiver, anodized, M4 feed ramps, ejection port door with rod and spring, forward assist assembly
• 10-inch ultra-slim freefloat Keymod handguard, aluminum
• BCG and charging handle not included

Perfect For

• Builders sourcing a compact .300 AAC Blackout AR-15 pistol upper build kit with a 7075-T6 anodized upper receiver and 10-inch ultra-slim freefloat Keymod handguard, pairing it with their own bolt carrier group and charging handle
• Shooters building a compact 10.5-inch pistol-gas .300 BLK platform who prefer to select their own BCG while having the parkerized HBAR barrel, anodized upper receiver with forward assist, and ultra-slim freefloat Keymod handguard covered in one kit
• AR-15 pistol builders who want a .300 AAC Blackout upper build kit with a GI birdcage flash hider at 5/8x24 and an ultra-slim freefloat Keymod handguard without sourcing components separately

Barrel and Muzzle Device

The 10.5-inch HBAR profile barrel is chambered in .300 AAC Blackout and finished in parkerized with a 1:8 twist rate and 5/8x24 thread pitch, which matches the included GI birdcage flash hider. The flash hider is compatible with .308 Winchester, 7.62x39, and .300 AAC Blackout. A black crush washer, a micro low-profile steel gas block at 0.750 diameter, and a pistol-length stainless steel gas tube cover the front end gas configuration on this pistol-length platform.

Upper Receiver and Handguard

The 7075-T6 aluminum upper receiver carries an anodized finish with M4 feed ramps, an ejection port door with rod and spring, and a forward assist assembly. The 10-inch ultra-slim freefloat Keymod handguard is aluminum with Keymod attachment points along the body for accessory mounting. These two components define the exterior structure of the upper assembly on this AR-15 pistol platform.

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