Davidson Defense Marauder w/SBA3 Brace 10.5-inch Pistol-Gas 1:8 .300 BLK AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit

Marauder SBA3 Brace 10.5-inch Pistol-Gas 1:8 .300 BLK AR-15 Freefloat M-LOK Pistol Full Build Kit

The Marauder is a .300 AAC Blackout AR-15 Full Build Kit 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 compatible with .223 Remington, 5.56 NATO, .300 Blackout, and .350 Legend, and a Mil-Spec AR-15 M4 charging handle complete the upper side. The lower hardware includes a complete Mil-Spec AR-15 lower parts kit with a fire control group and a Mil-Spec A2 grip in black, a heavy-duty 6-position aluminum carbine buffer tube in black, a standard 3 oz carbine buffer at carbine length, a USA-made standard AR-15 carbine recoil spring, a steel Mil-Spec receiver end plate, and an AR-15 carbine castle nut. The SB Tactical SBA3 5-position adjustable pistol stabilizing brace in black polymer with a flexible stabilizing arm support, compatible with Mil-Spec carbine buffer tubes, is included. Lower receiver not included.

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, .223 and 5.56 NATO and .300 Blackout and .350 Legend compatible
• Mil-Spec AR-15 M4 charging handle
• Complete Mil-Spec AR-15 lower parts kit, fire control group included, Mil-Spec A2 grip, black
• Heavy-duty 6-position aluminum carbine buffer tube, black
• Standard carbine buffer, 3 oz, carbine length
• Standard AR-15 carbine recoil spring, made in USA
• Steel Mil-Spec receiver end plate
• AR-15 carbine castle nut
• SB Tactical SBA3 5-position adjustable pistol stabilizing brace, black polymer, flexible stabilizing arm support, Mil-Spec carbine buffer tube compatible

Perfect For

• Builders sourcing a complete .300 AAC Blackout AR-15 pistol full build kit with a USA-made BCG and SBA3 5-position adjustable brace 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, buffer system, and SBA3 adjustable brace with flexible stabilizing arm support covered in one kit with a freefloat M-LOK handguard
• AR-15 builders who want a 10-inch freefloat M-LOK handguard with a .300 BLK HBAR barrel and complete lower parts kit included 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 is compatible with .223 Remington, 5.56 NATO, .300 Blackout, and .350 Legend. A Mil-Spec AR-15 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 and includes a fire control group and a Mil-Spec A2 grip in black. The buffer system includes a heavy-duty 6-position aluminum carbine buffer tube in black, a standard 3 oz carbine buffer at carbine length, a USA-made standard AR-15 carbine recoil spring, a steel Mil-Spec receiver end plate, and an AR-15 carbine castle nut. The SB Tactical SBA3 5-position adjustable pistol stabilizing brace in black polymer features a flexible stabilizing arm support and pairs with the included Mil-Spec carbine buffer tube, covering the rear brace interface for this pistol lower build kit.

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.