Davidson Defense Mutton Chops w/SBA5 Brace 11.5-inch Carbine-Gas 1:8 .223 Wylde AR-15 Freefloat Keymod Handguard Pistol Full Build Kit

Davidson Defense Mutton Chops AR-15 Pistol Full Build Kit with SB Tactical SBA5 Brace - 11.5-inch .223 Wylde Carbine-Gas Freefloat KeyMod Handguard

The Davidson Defense Mutton Chops is an AR-15 pistol full build kit chambered in .223 Wylde with an 11.5-inch government profile barrel. The kit includes the upper assembly, bolt carrier group, charging handle, SB Tactical SBA5 pistol stabilizing brace, mil-spec 6-position buffer tube, 3 oz carbine buffer, lower parts kit, and all associated buffer system hardware. The lower receiver is not included.

Key Features

• 11.5-inch 4140 CrMoV steel government profile barrel
• Nitride barrel finish
• 1:8 twist rate
• 1-in-2x28 thread pitch
• Carbine-length gas system with .750 O.D. micro low-profile gas block
• 7075-T6 aluminum upper receiver with M4 feed ramps, anodized finish
• 10-inch KeyMod freefloat handguard in 6061-T6 aluminum
• AR-15 5.56 NATO complete bolt carrier group in 8620 alloy steel with nitride finish, made in the USA
• Mil-spec AR-15 M4 charging handle
• 1-in-2x28 GI birdcage flash hider
• SB Tactical SBA5 pistol stabilizing brace in nylon reinforced polymer
• Mil-spec heavy-duty 6-position buffer tube
• 3 oz carbine buffer

Perfect For

• AR-15 pistol builders sourcing a complete kit around an 11.5-inch .223 Wylde upper
• Builders completing a stripped mil-spec AR-15 lower receiver
• Shooters running a KeyMod freefloat handguard configuration
• Builders adding an SB Tactical SBA5 brace to an AR-15 pistol build

Barrel and Gas System

The 11.5-inch government profile barrel is 4140 CrMoV steel with a nitride finish and a 1:8 twist rate. The muzzle is threaded at 1-in-2x28 and pairs with the included GI birdcage flash hider. The carbine-length gas system uses a .750 O.D. micro low-profile gas block positioned beneath the handguard. The .223 Wylde chamber is compatible with both .223 Remington and 5.56 NATO ammunition.

Upper Receiver and Handguard

The upper receiver is 7075-T6 aluminum with M4 feed ramps and an anodized finish. The 10-inch KeyMod freefloat handguard is 6061-T6 aluminum in black, extending past the gas block and providing a clean forend with KeyMod accessory slots along its surface. The handguard length exceeds the 11.5-inch barrel length, with the muzzle device providing the necessary clearance beyond the handguard.

Bolt Carrier Group and Charging Handle

The included bolt carrier group is a complete AR-15 5.56 NATO unit built from 8620 alloy steel with a nitride finish, made in the USA. It is compatible with .223 Wylde, 5.56 NATO, .300 Blackout, and .350 Legend configurations. The mil-spec M4 charging handle rounds out the upper component set.

SB Tactical SBA5 Brace and Buffer System

The SB Tactical SBA5 pistol stabilizing brace is nylon reinforced polymer in black and pairs with the included mil-spec heavy-duty 6-position buffer tube. The 3 oz carbine buffer, lower parts kit, and all associated buffer system hardware cover the core lower completion components outside the serialized lower receiver.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included.