Davidson Defense The Ranger w/Gauntlet Arms Brace 10.5-inch 1:8 5.56 NATO AR-15 Drop-In M-Lok Handguard Pistol Full Build Kit

The Ranger w/Gauntlet Arms Brace 10.5-inch 5.56 NATO AR-15 Full Build Kit

The Ranger is a Full Build Kit built around a Bear Creek Arsenal 10.5-inch M4-profile 5.56 NATO barrel, built from 4150 chrome moly vanadium steel and finished in Parkerized, paired with a 7000 Series optimized AR-15 flat-top upper receiver finished in Type III black hardcoat anodizing. It pairs a drop-in carbine handguard finished in FDE with an A2 birdcage flash hider at the muzzle, running on a carbine-length gas system with a fixed A2-style front sight base. A complete bolt carrier group, Mil-Spec charging handle, complete Lower Parts Kit, pistol-caliber buffer-system components, and a Gauntlet Arms polymer stabilizing brace round out the rest of the build. The lower receiver is not included, leaving the buyer to select and supply that component separately.

Key Features

• Bear Creek Arsenal 10.5-inch M4-profile 5.56 NATO barrel, 1:8 twist, Parkerized finish
• Carbine-length gas system
• Fixed A2-style front sight base with integrated sling attachment
• A2 birdcage flash hider
• 7000 Series optimized AR-15 flat-top upper receiver, Type III black hardcoat anodized, dust cover pin feature
• Drop-in carbine handguard, M-LOK, FDE finish
• Complete bolt carrier group and Mil-Spec charging handle included
• Gauntlet Arms polymer stabilizing brace included
• Complete Mil-Spec Lower Parts Kit and pistol-caliber buffer-system components included
• Lower receiver is not included.

Barrel and Gas System

The Bear Creek Arsenal barrel runs 10.5 inches long, chambered in 5.56 NATO and built from 4150 chrome moly vanadium steel with a Parkerized finish and M4 profile. It carries a 1:8 twist rate. Gas cycles back to the action through a carbine-length system, running a carbine-length stainless steel gas tube.

Front Sight Base and Muzzle Device

A fixed A2-style front sight base sits at the front of the barrel, with an integrated sling attachment point. Capping the muzzle is an A2 birdcage flash hider.

Upper Receiver and Handguard

The upper receiver is a 7000 Series optimized AR-15 flat-top unit, machined from aluminum and finished in Type III black hardcoat anodizing, featuring a dust cover pin feature with the ejection port door included, along with its rod and spring. Over the barrel sits a drop-in carbine handguard finished in FDE, using an M-LOK attachment system along its length.

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 build remain 5.56 NATO. A Mil-Spec AR-15 M4 charging handle rounds out the upper's operating components.

Lower Parts Kit and Buffer System

A complete Mil-Spec AR-15 Lower Parts Kit covers the fire-control and lower-control internals needed once a lower receiver is on hand, including a pistol grip. Behind it sits a fixed, heavy-duty pistol-style receiver extension, holding a standard AR-15 carbine buffer weighing 3 ounces and a standard USA-made recoil spring.

Stabilizing Brace

Capping off the build is a Gauntlet Arms polymer stabilizing brace, finished in black, mounting directly to the pistol buffer tube included with this kit.

Follow all manufacturer instructions and safe handling practices.

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

Lower receiver is not included.