Davidson Defense Desert 8.5-inch Pistol-Gas 1:8 300 BLK AR-15 M-Lok Pistol Upper Build Kit

Desert 8.5-Inch Pistol-Gas 1:8 .300 BLK AR-15 M-LOK Pistol Upper Build Kit

The Desert Upper Build Kit is built around an 8.5-inch .300 Blackout heavy profile barrel with a pistol-length gas system and a 7-inch M-LOK handguard in FDE Cerakote. BCG and charging handle are not included.

Key Features

• 8.5-inch heavy profile barrel, 1:8 twist, Parkerized finish
• Pistol-length gas system
• 7075-T6 aluminum upper receiver with M4 feed ramps, anodized finish
• 7-inch M-LOK compatible minimalist handguard in FDE Cerakote
• GI A2 Birdcage flash hider on 5/8x24 threads with 5/8-inch black crush washer
• BCG and charging handle are not included.

Barrel and Gas System

The 8.5-inch barrel is built in a heavy profile and finished in Parkerized coating, giving it added mass for heat management along the shorter pistol-length platform. Its 1:8 twist rate is matched to .300 Blackout, supporting both lighter supersonic loads and the heavier subsonic loads the cartridge is often paired with. The pistol-length gas system runs through a dedicated pistol-length gas tube and a micro low-profile steel gas block sized to a .750-inch diameter, matched to the barrel's .750-inch gas block journal. At the muzzle, 5/8x24 threads carry the included GI A2 Birdcage flash hider, rated for .308 Winchester, 7.62x39mm, and .300 Blackout, and it's secured in place with the supplied 5/8-inch black crush washer.

Upper Receiver and Handguard

The upper receiver is machined from 7075-T6 aluminum with M4 feed ramps and finished in a black anodized coating, and it arrives with the forward assist assembly and the ejection port door, rod, and spring already in place. Over the barrel and gas system sits a 7-inch M-LOK compatible handguard built in an ultra-lightweight minimalist style, finished in FDE Cerakote to contrast against the black receiver. Because it's built without anti-rotation tabs, the handguard keeps a cleaner, lower-profile look along the barrel compared to tabbed designs.

Follow all manufacturer instructions and safe handling practices.

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