Davidson Defense Marauder 10.5-inch Pistol-Gas 1:8 .300 BLK AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit, SBR Ready

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

The Marauder is a .300 AAC Blackout AR-15 Full Build Kit configured for the SBR Ready designation. The kit centers on a 10.5-inch HBAR profile steel barrel with a Parkerized finish, 1:8 twist rate, and 5/8x24 thread pitch, paired with a GI 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 style grip in black, a heavy-duty AR-15 6-position carbine buffer tube in black aluminum, a standard 3 oz carbine buffer at carbine length, a USA-made standard carbine recoil spring, a steel AR-15 M16 Mil-Spec receiver end plate, and a steel AR-15 carbine castle nut. This kit ships without a brace and is intended for customers selecting their own final setup. Lower receiver not included.

Key Features

• 10.5-inch HBAR profile steel 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
• GI 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 style grip, black
• Heavy-duty AR-15 6-position carbine buffer tube, black aluminum
• Standard carbine buffer, 3 oz, carbine length
• Standard carbine recoil spring, made in USA
• Steel AR-15 M16 Mil-Spec receiver end plate
• Steel AR-15 carbine castle nut
• SBR Ready configuration

Perfect For

• Builders sourcing a complete .300 AAC Blackout AR-15 pistol full build kit with a USA-made BCG and complete lower parts kit already included, pairing it with their own lower receiver and selecting their own rear brace or stock
• Shooters building a compact 10.5-inch .300 BLK pistol-gas platform who want the BCG, buffer system, and 6-position carbine buffer tube covered without a rear interface commitment
• AR-15 builders who want a 10-inch freefloat M-LOK handguard with a .300 BLK HBAR barrel and complete lower parts kit in an SBR Ready kit

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 GI 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.

SBR Ready Configuration

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 style grip in black. The buffer system includes a heavy-duty AR-15 6-position carbine buffer tube in black aluminum, a standard 3 oz carbine buffer at carbine length, a USA-made standard carbine recoil spring, a steel AR-15 M16 Mil-Spec receiver end plate, and a steel AR-15 carbine castle nut. This kit ships without a brace, with the brace or stock selection remaining with the buyer.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Ships without a brace. Do not attach a stock unless compliant with applicable laws. Lower receiver not included.