Davidson Defense Marauder w/Gauntlet Arms Brace 10.5-inch 1:10 9MM AR-9 Freefloat M-Lok Handguard Pistol Full Build Kit

Marauder Gauntlet Arms Brace 10.5-inch 1:10 9mm AR-9 Freefloat M-LOK Pistol Full Build Kit

The Marauder is a 9mm AR-9 Full Build Kit built around a compact 10.5-inch platform. The kit centers on a 10.5-inch Bear Creek Arsenal steel barrel with a black nitride finish, 1:10 twist rate, and 1/2x36 thread pitch, paired with a black A2 birdcage flash hider and a black crush washer. The upper receiver is a Vertex Enhanced pistol caliber billet aluminum PCC upper receiver with a black anodized finish, paired with a 10-inch freefloat M-LOK handguard in black with a full-length Picatinny top rail. A 9mm blowback nitride bolt carrier group in 8620 alloy steel with an external extractor, compatible with Glock and Colt pattern magazines, and a Mil-Spec M4 charging handle complete the upper side. The lower hardware includes a complete Mil-Spec AR-15 lower parts kit, a heavy-duty pistol buffer tube for AR-15 and AR style pistols, an AR-15 9mm carbine buffer, a standard AR-15 carbine recoil spring, a Mil-Spec M16 style receiver end plate, and a Mil-Spec AR-15 carbine castle nut. The Gauntlet Arms high-strength polymer stabilizing brace in black is included. Lower receiver not included.

Key Features

• 10.5-inch Bear Creek Arsenal steel barrel, black nitride finish, 1:10 twist, 1/2x36 thread pitch, 9mm
• A2 birdcage flash hider, black, 1/2x36, black crush washer included
• Vertex Enhanced pistol caliber billet aluminum PCC upper receiver, black anodized
• 10-inch freefloat M-LOK handguard, black, full-length Picatinny top rail
• 9mm blowback nitride bolt carrier group, 8620 alloy steel, external extractor, Glock and Colt pattern magazine compatible
• Mil-Spec M4 charging handle
• Complete Mil-Spec AR-15 lower parts kit
• Heavy-duty pistol buffer tube, AR-15 and AR style pistol compatible
• AR-15 9mm carbine buffer
• Standard AR-15 carbine recoil spring
• Mil-Spec M16 style receiver end plate
• Mil-Spec AR-15 carbine castle nut
• Gauntlet Arms high-strength polymer stabilizing brace, black

Perfect For

• Builders sourcing a complete 9mm AR-9 pistol full build kit with a Bear Creek Arsenal nitride barrel, Vertex Enhanced PCC billet upper, and Gauntlet Arms brace already included, pairing it with their own lower receiver
• Shooters building a compact 10.5-inch 9mm pistol platform who want Glock and Colt pattern magazine compatibility, a 9mm carbine buffer, and a pistol buffer tube with Gauntlet Arms brace covered in one kit
• AR-9 builders who want a 10-inch freefloat M-LOK handguard with a full-length Picatinny top rail and complete lower parts kit included without sourcing components separately

Barrel and Muzzle Device

The 10.5-inch Bear Creek Arsenal barrel is chambered in 9mm and constructed from steel with a black nitride finish. The twist rate is 1:10 and the thread pitch is 1/2x36, which matches the included black A2 birdcage flash hider. A black crush washer is included with the muzzle device.

Vertex Enhanced PCC Upper Receiver and Handguard

The Vertex Enhanced pistol caliber billet aluminum PCC upper receiver carries a black anodized finish and is purpose-built around the AR-9 platform. The 10-inch freefloat M-LOK handguard is black with a full-length Picatinny top rail and M-LOK attachment points along the body for accessory mounting. These two components define the exterior structure of the upper assembly on this AR-9 platform.

9mm Bolt Carrier Group and Charging Handle

The 9mm blowback nitride bolt carrier group is 8620 alloy steel with an external extractor, compatible with both Glock and Colt pattern magazines. A Mil-Spec M4 charging handle is included to complete the upper component set.

Lower Parts Kit and Buffer System

The complete Mil-Spec AR-15 lower parts kit covers the internal lower receiver components. The buffer system includes a heavy-duty pistol buffer tube for AR-15 and AR style pistols, an AR-15 9mm carbine buffer, a standard AR-15 carbine recoil spring, a Mil-Spec M16 style receiver end plate, and a Mil-Spec AR-15 carbine castle nut. The Gauntlet Arms high-strength polymer stabilizing brace in black rounds out the kit, providing a rear interface for the pistol platform.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included. Verify local and state laws regarding pistol brace use and classification.