Davidson Defense Centurion 18-inch Mid-Gas 1:10 .308 Win AR-10 M-Lok Rifle Upper Build Kit

Centurion 18-inch .308 Winchester AR-10 Upper Build Kit

The Centurion is built around an 18-inch "Scrubber" LR-308 contour barrel chambered in .308 Winchester, machined from 4150 chrome moly vanadium steel and finished in manganese phosphate. It's paired with an LR-308 billet upper receiver machined to the DPMS low-profile pattern. It pairs an LR-308 handguard with a GI-style birdcage flash hider at the muzzle, running on a mid-length gas system. BCG and charging handle are not included, leaving the buyer to supply those components separately.

Key Features

• "Scrubber" 18-inch .308 Winchester contour barrel, 1:10 twist, manganese phosphate finish
• Mid-length gas system with micro low-profile steel gas block
• LR-308 billet upper receiver, DPMS low-profile pattern, no forward assist
• LR-308 handguard, SKU 1308-15-40650-CLOSEOUT
• GI-style birdcage flash hider, compatible with .308, 7.62x39, and .300 Blackout
• BCG and charging handle are not included.

Barrel and Gas System

The "Scrubber" barrel runs 18 inches long, chambered in .308 Winchester and machined from 4150 chrome moly vanadium steel with a manganese phosphate finish and contour profile. It carries a 1:10 twist rate and a 5/8x24 muzzle thread. Gas cycles back to the action through a mid-length system, running a stainless steel mid-length gas tube and a micro low-profile steel gas block sized to a .750-inch journal.

Upper Receiver and Handguard

The upper receiver is a billet unit built to the DPMS low-profile pattern, finished in Type III hardcoat black anodizing and machined without a forward assist. The ejection port door ships assembled. Over the barrel sits an LR-308 handguard, identified by SKU 1308-15-40650-CLOSEOUT.

Muzzle Device

Capping the muzzle is a GI-style birdcage flash hider, listed as compatible with .308, 7.62x39, and .300 Blackout. It threads onto the barrel's 5/8x24 pattern and is secured with the included 5/8-inch black crush washer.

Follow all manufacturer instructions and safe handling practices.

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

BCG and charging handle are not included.