Davidson Defense Aegis Lightweight 14.5-inch Mid-Gas 1:7 5.56 NATO AR-15 M-Lok Pistol Upper Build Kit

Aegis Lightweight 14.5-inch 5.56 NATO AR-15 Upper Build Kit

The Aegis Lightweight is built around a 14.5-inch 5.56 NATO barrel with a medium profile, finished in nitride, paired with a 7075-T6 aluminum upper receiver finished in black anodizing. It pairs a 12-inch ultra-lightweight minimalist handguard with a GI-style A2 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

• 14.5-inch 5.56 NATO barrel, 1:7 twist, medium profile, Nitride finish
• Mid-length gas system with micro low-profile steel gas block
• 7075-T6 aluminum upper receiver, black anodized finish
• 12-inch ultra-lightweight minimalist handguard, partial top rail
• GI-style A2 birdcage flash hider
• BCG and charging handle are not included.

Barrel and Gas System

The barrel on this build runs 14.5 inches long, chambered in 5.56 NATO and built from 4150 chrome moly vanadium steel with a nitride finish and medium profile. It carries a 1:7 twist rate and a 1/2x28 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 machined from 7075-T6 aluminum and finished in black anodizing, cut with M4 feed ramps for smooth feeding and fitted with an AR-15 forward assist assembly. The ejection port carries a standard .223/5.56 door with its rod and spring installed. Over the barrel sits a 12-inch ultra-lightweight minimalist handguard with a partial top rail rather than a full-length rail. This handguard does not include anti-rotation tabs.

Muzzle Device

Capping the muzzle is a GI-style A2 birdcage flash hider, threaded to match the barrel's 1/2x28 pattern and secured with the included 1/2-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.