Davidson Defense Blemished Mongoose 11.5-inch Carbine-Gas 1:8 .223 Wylde AR-15 Freefloat Keymod Handguard Pistol Assembled Upper Receiver

Davidson Defense Mongoose Blemished AR-15 Assembled Upper - 11.5-inch, .223 Wylde, Carbine Gas, Keymod Freefloat Handguard

The Davidson Defense Mongoose is a .223 Wylde AR-15 assembled upper built around a 7075-T6 aluminum upper receiver with an anodized finish and M4 feed ramps. The build includes an 11.5-inch government profile barrel in 4140 chrome moly vanadium steel with a nitride finish, a 1:8 twist rate, and a 1/2x28 thread pitch, a freefloat Keymod handguard in black aluminum, a micro low-profile 0.750 carbine gas block, and a GI Birdcage flash hider at 1/2x28. The Keymod handguard on this upper is Blem. BCG and charging handle are not included.

Key Features

• 7075-T6 aluminum upper receiver, anodized finish, M4 feed ramps
• 11.5-inch government profile barrel, 4140 chrome moly vanadium, nitride finish
• .223 Wylde
• 1:8 twist rate
• 1/2x28 thread pitch
• Carbine gas system
• Micro low-profile 0.750 gas block
• Freefloat Keymod handguard, aluminum, black
• Blem handguard
• GI Birdcage flash hider, 1/2x28
• BCG not included
• Charging handle not included

Perfect For

• AR-15 pistol builders sourcing an 11.5-inch .223 Wylde assembled upper at a reduced price point
• Shooters pairing this upper with an existing AR-15 lower assembly and their own BCG and charging handle
• Builders who prioritize function over cosmetics and want a capable upper at a value price

Blem Handguard

The Keymod handguard on this upper is Blem. Blem indicates the handguard carries minor cosmetic imperfections that do not affect fit, function, or structural integrity. The upper receiver and barrel are not affected.

Barrel and Gas System

The barrel is an 11.5-inch government profile unit in 4140 chrome moly vanadium steel with a nitride finish, chambered in .223 Wylde with a 1:8 twist rate and a 1/2x28 thread pitch. The carbine-length gas system pairs with a micro low-profile 0.750 gas block to cover the gas regulation side of the upper. A GI Birdcage flash hider at 1/2x28 rounds out the muzzle end.

Upper Receiver and Handguard

The upper receiver is 7075-T6 aluminum with an anodized finish and M4 feed ramps, forming the structural core of the upper assembly. The freefloat Keymod handguard is black aluminum, surrounding the barrel without contact and providing Keymod mounting positions for compatible accessories.

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