Davidson Defense Marauder 10.5-inch Pistol-Gas 1:8 .300 BLK AR-15 Freefloat M-Lok Handguard Pistol Complete Upper Build

Marauder 10.5-inch Pistol-Gas 1:8 .300 BLK AR-15 Freefloat M-LOK Pistol Complete Upper

The Marauder is a .300 AAC Blackout AR-15 Complete Upper built around a compact 10.5-inch pistol-length gas platform. The kit centers on a 10.5-inch HBAR profile barrel with a Parkerized finish, 1:8 twist rate, and 5/8x24 thread pitch, paired with an A2 birdcage flash hider compatible with .300 Blackout, .308 Winchester, and 7.62x39, and a black crush washer. A micro low-profile steel gas block at 0.750 diameter and a pistol-length gas tube are included on the front end. The upper receiver is 7075-T6 aluminum with an anodized finish, M4 feed ramps, an ejection port cover assembly, and a forward assist, paired with a 10-inch freefloat M-LOK handguard in black. A USA-made complete AR-15 bolt carrier group in black nitride QPQ finish, compatible with .223 Remington, 5.56 NATO, .300 Blackout, and .350 Legend, and a black anodized aluminum Mil-Spec AR-15 M4 charging handle complete the upper component set.

Key Features

• 10.5-inch HBAR profile barrel, Parkerized finish, 1:8 twist, 5/8x24 thread pitch, .300 AAC Blackout
• Pistol-length gas system
• Pistol-length gas tube
• Micro low-profile steel gas block, 0.750
• A2 birdcage flash hider, 5/8x24, .300 Blackout and .308 Winchester and 7.62x39 compatible, black crush washer included
• 7075-T6 aluminum upper receiver, anodized, M4 feed ramps, ejection port cover assembly, forward assist
• 10-inch freefloat M-LOK handguard, black
• USA-made complete AR-15 bolt carrier group, black nitride QPQ finish, .223 and 5.56 NATO and .300 Blackout and .350 Legend compatible
• Mil-Spec AR-15 M4 charging handle, aluminum, black anodized

Perfect For

• Builders sourcing a complete .300 AAC Blackout AR-15 pistol upper with a USA-made black nitride QPQ BCG and charging handle already included, pairing it with their own lower receiver
• Shooters building a compact 10.5-inch .300 BLK pistol-gas platform who want the BCG and charging handle covered in one complete upper with a 10-inch freefloat M-LOK handguard
• AR-15 builders who want a .300 BLK pistol-length gas complete upper with a micro low-profile gas block and forward assist upper without sourcing components separately

Barrel and Muzzle Device

The 10.5-inch HBAR profile barrel is chambered in .300 AAC Blackout with a Parkerized finish, 1:8 twist rate, and 5/8x24 thread pitch. The A2 birdcage flash hider is compatible with .300 Blackout, .308 Winchester, and 7.62x39 at the 5/8x24 thread pitch. A micro low-profile steel gas block at 0.750 diameter and a pistol-length gas tube cover the front end gas configuration on this pistol-length platform. A black crush washer is included with the muzzle device.

Upper Receiver and Handguard

The 7075-T6 aluminum upper receiver carries an anodized finish with M4 feed ramps, an ejection port cover assembly, and a forward assist. The 10-inch freefloat M-LOK handguard is black with M-LOK attachment points along the body for accessory mounting. These two components define the exterior structure of the upper assembly on this .300 BLK platform.

Bolt Carrier Group and Charging Handle

The USA-made complete AR-15 bolt carrier group carries a black nitride QPQ finish and is compatible with .223 Remington, 5.56 NATO, .300 Blackout, and .350 Legend. A Mil-Spec AR-15 M4 charging handle in black anodized aluminum is included to complete the upper component set.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.