Davidson Defense Gladius w/Gauntlet Arms Brace 10.5-inch Pistol-Gas 1:8 .300 BLK AR-15 Freefloat Tubular M-Lok Handguard Pistol Full Build Kit

Davidson Defense Gladius with Gauntlet Arms Brace 10.5 Inch Pistol-Gas 1-8 .300 BLK AR-15 Freefloat Tubular M-Lok Handguard Pistol Full Build Kit

The Davidson Defense Gladius with Gauntlet Arms Brace Full Build Kit is chambered in .300 Blackout and built on the AR-15 platform. This full build kit includes a 10.5-inch HBAR barrel with a pistol-length gas system, a micro low-profile gas block, a freefloat tubular M-Lok handguard, an AR-15 upper receiver with M4 feed ramps, a complete bolt carrier group, an AR-15 M4 charging handle, a GI birdcage flash hider, a Gauntlet Arms polymer stabilizing brace, a standard carbine recoil buffer, and a Mil-Spec receiver end plate. The lower receiver is not included.

Key Features

• 10.5-inch HBAR barrel in 4150 CrMoV steel with phosphate finish and 1:8 twist rate
• Pistol-length gas system
• Micro low-profile gas block, .750 OD, steel construction
• 5-8x24 barrel thread pitch
• Freefloat tubular M-Lok handguard in aluminum
• AR-15 upper receiver with M4 feed ramps in 7075-T6 aluminum with anodized finish
• AR-15 complete bolt carrier group in 8620 alloy steel with nitride finish
• AR-15 M4 charging handle, Mil-Spec
• GI birdcage flash hider, 5-8x24 thread pitch
• Gauntlet Arms polymer stabilizing brace, black, high-strength polymer
• Standard carbine recoil buffer, 3 oz
• Mil-Spec AR-15 M16 receiver end plate
• Lower receiver not included

Perfect For

• AR-15 builders sourcing a complete .300 Blackout pistol full build kit with brace included
• Those working with a 10.5-inch HBAR barrel and pistol-length gas system configuration
• Builders seeking a tubular M-Lok handguard profile paired with a Gauntlet Arms stabilizing brace
• Those pairing this full build kit with a separately sourced lower receiver

Barrel and Gas System

The 10.5-inch HBAR barrel is constructed from 4150 CrMoV steel with a phosphate finish and a 1:8 twist rate. The barrel is chambered in .300 Blackout with a pistol-length gas system and a 5-8x24 thread pitch. The micro low-profile gas block has a .750-inch outer diameter, is constructed from steel, and is a separate component positioned beneath the handguard independent of the handguard body.

Handguard and Upper Receiver

The freefloat tubular M-Lok handguard is constructed from aluminum and provides M-Lok attachment points along the handguard body for accessory mounting. The tubular profile keeps overall handguard weight low while maintaining a full-length mounting surface. The AR-15 upper receiver is constructed from 7075-T6 aluminum with an anodized finish and includes M4 feed ramps.

Bolt Carrier Group and Charging Handle

The complete bolt carrier group is compatible with AR-15 5.56, .223, .300, and .350 configurations and is constructed from 8620 alloy steel with a nitride finish. The nitride finish provides surface hardness and corrosion resistance across the bolt carrier group components. The AR-15 M4 charging handle is Mil-Spec quality and is included with this full build kit.

Gauntlet Arms Brace and Buffer Components

The Gauntlet Arms polymer stabilizing brace is constructed from high-strength polymer in black. The kit includes a standard carbine recoil buffer at 3 oz and a Mil-Spec AR-15 M16 receiver end plate. These components are included as part of the full build kit component set.

Muzzle Device

The included muzzle device is an AR-15 and AR-10 GI birdcage flash hider with a 5-8x24 thread pitch. The thread pitch matches the barrel thread pitch on this full build kit. This muzzle device is listed as compatible with AR-15 and AR-10 platforms at the 5-8x24 thread specification.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included.