Davidson Defense Aegis 8.5-inch Pistol-Gas 1:8 .300 BLK AR-15 Freefloat M-Lok Handguard Pistol Assembled Upper Receiver

Aegis 8.5-Inch Pistol-Gas 1-8 .300 BLK AR-15 Freefloat M-LOK Handguard Pistol Assembled Upper Receiver

This fully assembled AR-15 upper build kit is chambered in .300 AAC Blackout and built around an 8.5-inch heavy profile Bear Creek Arsenal steel barrel with a Parkerized finish, a 1-8 twist rate, and a pistol-length gas system. Professionally assembled and ready to install on a compatible lower receiver, it features a 7075-T6 aluminum upper receiver with an anodized finish, M4 feed ramps, a forward assist, and a .223/5.56 ejection port door with rod and spring already installed. The 7-inch ultra-lightweight minimalist freefloat M-LOK handguard keeps the front end trim and light on this compact pistol-length build. An AR-10 .308 A2 Birdcage flash hider and a black 5-8-inch crush washer finish the muzzle end. BCG and charging handle are not included.

Key Features

• Fully assembled AR-15 upper, ready to install on a compatible lower receiver
• .300 AAC Blackout chambering, 8.5-inch heavy profile Bear Creek Arsenal steel barrel, Parkerized finish
• 1-8 twist rate, 5-8x24 thread pitch
• Pistol-length gas system with pistol-length stainless steel gas tube
• Recoil Technologies micro low-profile steel gas block, .750 inch
• 7075-T6 aluminum upper receiver, anodized, M4 feed ramps
• .223 and 5.56 ejection port door with rod and spring
• Forward assist included
• 7-inch ultra-lightweight minimalist freefloat M-LOK handguard
• AR-10 .308 A2 Birdcage flash hider, .308 Win and .350 Legend compatible, 5-8x24 thread pitch
• Black 5-8-inch crush washer

Perfect For

• Shooters looking for a ready-to-install, fully assembled .300 BLK upper without needing to assemble the barrel, gas system, or handguard
• AR-15 owners adding an 8.5-inch pistol-length .300 BLK upper to an existing lower with a BCG and charging handle on hand
• Builders who want a Bear Creek Arsenal barrel and lightweight minimalist handguard in one compact pistol-length upper kit

Upper Receiver and Barrel

This upper arrives fully assembled, with the barrel, gas system, handguard, forward assist, ejection port door, and flash hider professionally installed and ready for use. The 7075-T6 aluminum upper receiver with an anodized finish and M4 feed ramps forms the core of the assembly. The 8.5-inch heavy profile Bear Creek Arsenal steel barrel features a Parkerized finish, a 1-8 twist rate, and a .300 AAC Blackout chamber with a 5-8x24 threaded muzzle. A pistol-length stainless steel gas tube and Recoil Technologies micro low-profile .750 steel gas block provide a compact pistol-length gas system optimized for the 8.5-inch barrel. The 7-inch ultra-lightweight minimalist freefloat M-LOK handguard keeps the front end lightweight and maneuverable while providing M-LOK attachment slots for accessories.

Muzzle Device

The included AR-10 .308 A2 Birdcage flash hider is factory installed on the 5-8x24 threaded muzzle using the included black 5-8-inch crush washer. The flash hider is compatible with .308 Winchester and .350 Legend muzzle devices sharing the same thread pitch.

Follow safe handling and manufacturer instructions.

Ensure compliance with all applicable federal, state, and local laws.

BCG and charging handle are not included.