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

Aegis Lightweight 14.5-inch 5.56 NATO AR-15 Complete Upper

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. A complete bolt carrier group and Mil-Spec charging handle round out the upper, giving the buyer everything needed on the upper side.

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
• Complete bolt carrier group and Mil-Spec charging handle 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.

Bolt Carrier Group and Charging Handle

A complete AR-15 bolt carrier group is included, made in the USA and listed for use across 5.56 NATO, .223 Remington, .300 Blackout, and .350 Legend. That broader listing describes the BCG itself; the barrel and chambering on this upper remain 5.56 NATO. A Mil-Spec AR-15 M4 charging handle rounds out the upper's operating components.

Follow all manufacturer instructions and safe handling practices.

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