Davidson Defense Marauder w/SBA3 Brace 10.5-inch Carbine-Gas 1:8 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit

Marauder SBA3 Brace 10.5-inch Carbine-Gas 1:8 5.56 NATO AR-15 Freefloat M-LOK Pistol Full Build Kit

The Marauder is a 5.56 NATO AR-15 Full Build Kit built around a compact 10.5-inch carbine-length gas platform. The kit centers on a 10.5-inch cryogenically treated Sandel government profile steel barrel with a phosphate finish, 1:8 twist rate, and 1/2x28 thread pitch, paired with an A2 GI birdcage flash hider and a black crush washer. A micro low-profile gas block at 0.750 diameter and a carbine-length stainless steel gas tube are included on the front end. The upper receiver is a 7075-T6 aluminum design with a black 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 with a full-length Picatinny top rail. A USA-made complete AR-15 bolt carrier group in black nitride, 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, a heavy-duty Mil-Spec 6-position carbine buffer tube, a standard 3 oz carbine buffer, a USA-made standard carbine recoil spring, an AR-15 M16 Mil-Spec receiver end plate, and an AR-15 Mil-Spec castle nut. The SB Tactical SBA3 5-position adjustable pistol stabilizing brace in black, compatible with Mil-Spec carbine buffer tubes, is included. Lower receiver not included.

Key Features

• 10.5-inch cryogenically treated Sandel government profile steel barrel, phosphate finish, 1:8 twist, 1/2x28 thread pitch, 5.56 NATO
• Carbine-length gas system
• Carbine-length stainless steel gas tube
• Micro low-profile gas block, 0.750
• A2 GI birdcage flash hider, 1/2x28, black crush washer included
• 7075-T6 aluminum upper receiver, black anodized, M4 feed ramps, ejection port cover assembly, forward assist
• 10-inch freefloat M-LOK handguard, black, full-length Picatinny top rail
• USA-made complete AR-15 bolt carrier group, black nitride, .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
• Heavy-duty Mil-Spec 6-position carbine buffer tube
• Standard carbine buffer, 3 oz
• Standard carbine recoil spring, made in USA
• AR-15 M16 Mil-Spec receiver end plate
• AR-15 Mil-Spec castle nut
• SB Tactical SBA3 5-position adjustable pistol stabilizing brace, black, Mil-Spec carbine buffer tube compatible

Perfect For

• Builders sourcing a complete 5.56 NATO AR-15 pistol full build kit with a cryogenically treated Sandel barrel, USA-made black nitride BCG, and SBA3 adjustable brace already included, pairing it with their own lower receiver
• Shooters building a compact 10.5-inch carbine-gas pistol platform who want the BCG, Mil-Spec 6-position carbine buffer tube, and SBA3 5-position adjustable brace covered in one kit with a full-length Picatinny top rail handguard
• AR-15 builders who want a 10-inch freefloat M-LOK handguard with a Sandel cryogenically treated barrel and complete lower parts kit included without sourcing components separately

Barrel and Muzzle Device

The 10.5-inch Sandel government profile barrel is chambered in 5.56 NATO and constructed from steel with a phosphate finish and cryogenic treatment. Cryogenic treatment subjects the barrel steel to deep cold temperatures to relieve residual stress in the metal structure. The twist rate is 1:8 and the thread pitch is 1/2x28, which matches the included A2 GI birdcage flash hider. A black crush washer, a micro low-profile gas block at 0.750 diameter, and a carbine-length stainless steel gas tube cover the front end gas configuration on this carbine-length platform.

Upper Receiver and Handguard

The 7075-T6 aluminum upper receiver carries a black 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 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-15 platform.

Bolt Carrier Group and Charging Handle

The USA-made complete AR-15 bolt carrier group carries a black nitride finish and 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. The buffer system includes a heavy-duty Mil-Spec 6-position carbine buffer tube, a standard 3 oz carbine buffer, a USA-made standard carbine recoil spring, an AR-15 M16 Mil-Spec receiver end plate, and an AR-15 Mil-Spec castle nut. The SB Tactical SBA3 5-position adjustable pistol stabilizing brace in black pairs with the included Mil-Spec 6-position carbine buffer tube and covers 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.