Davidson Defense Mini Sledge w/Gauntlet Arms Brace 10.5-inch Carbine-Gas 1:24 .450 Bushmaster AR-15 Freefloat Keymod Handguard Pistol Full Build Kit

Mini Sledge Gauntlet Arms Brace 10.5-inch Carbine-Gas 1:24 .450 Bushmaster AR-15 Freefloat Keymod Pistol Full Build Kit

The Mini Sledge is a .450 Bushmaster AR-15 Full Build Kit built around a compact 10.5-inch carbine-length gas platform. The kit centers on a 10.5-inch HBAR profile parkerized steel barrel with a 1:24 twist rate and 5/8x32 thread pitch, paired with a KAK .458 compensator and a black 5/8-inch crush washer. A micro low-profile steel gas block at 0.750 diameter and a carbine-length stainless steel gas tube are included on the front end. The billet Panhead upper receiver features a .458 ejection port door, paired with a 10-inch ultra-slim freefloat Keymod handguard. A complete .458 SOCOM and .450 Bushmaster bolt carrier group 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 Mil-Spec AR-15 A2 style grip, a heavy-duty AR-15 pistol buffer tube, a standard 3 oz AR-15 carbine recoil buffer, a USA-made standard AR-15 carbine recoil spring, a Mil-Spec AR-15 M16 receiver end plate, and a Mil-Spec AR-15 carbine castle nut. The Gauntlet Arms polymer stabilizing brace in black is included. Lower receiver not included.

Key Features

• 10.5-inch HBAR profile parkerized steel barrel, 1:24 twist, 5/8x32 thread pitch, .450 Bushmaster
• Carbine-length gas system
• Carbine-length stainless steel gas tube
• Micro low-profile steel gas block, 0.750
• KAK .458 compensator, 5/8x32, black 5/8-inch crush washer included
• Billet Panhead upper receiver, .458 ejection port door
• 10-inch ultra-slim freefloat Keymod handguard
• Complete .458 SOCOM and .450 Bushmaster bolt carrier group
• Mil-Spec AR-15 M4 charging handle
• Complete Mil-Spec AR-15 lower parts kit, Mil-Spec AR-15 A2 style grip included
• Heavy-duty AR-15 pistol buffer tube
• Standard AR-15 carbine recoil buffer, 3 oz
• Standard AR-15 carbine recoil spring, made in USA
• Mil-Spec AR-15 M16 receiver end plate
• Mil-Spec AR-15 carbine castle nut
• Gauntlet Arms polymer stabilizing brace, black

Perfect For

• Builders sourcing a complete .450 Bushmaster AR-15 pistol full build kit with a billet Panhead upper receiver, 10.5-inch HBAR parkerized barrel, .458 SOCOM and .450 Bushmaster BCG, 10-inch ultra-slim Keymod freefloat handguard, and Gauntlet Arms polymer brace with a pistol buffer tube already included, pairing it with their own lower receiver
• Shooters building a compact 10.5-inch carbine-gas .450 Bushmaster pistol platform who want the BCG, charging handle, complete lower parts kit, pistol buffer tube, and Gauntlet Arms polymer brace covered in one kit with a KAK .458 compensator and ultra-slim Keymod handguard
• AR-15 pistol builders who want a .450 Bushmaster full build kit with a billet Panhead upper receiver, .458 ejection port door, and KAK .458 compensator at 5/8x32 with a Gauntlet Arms polymer brace without sourcing components separately

Barrel and Muzzle Device

The 10.5-inch HBAR profile barrel is chambered in .450 Bushmaster and constructed from parkerized steel with a 1:24 twist rate and 5/8x32 thread pitch, which matches the included KAK .458 compensator. A black 5/8-inch crush washer, a micro low-profile steel 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 billet Panhead upper receiver features a .458 ejection port door sized for the .450 Bushmaster platform. The 10-inch ultra-slim freefloat Keymod handguard features Keymod attachment points along the body for accessory mounting. These two components define the exterior structure of the upper assembly on this AR-15 pistol platform.

Bolt Carrier Group and Charging Handle

The complete .458 SOCOM and .450 Bushmaster bolt carrier group is compatible with the .450 Bushmaster platform. 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 Mil-Spec AR-15 A2 style grip. The buffer system includes a heavy-duty AR-15 pistol buffer tube, a standard 3 oz AR-15 carbine recoil buffer, a USA-made standard AR-15 carbine recoil spring, a Mil-Spec AR-15 M16 receiver end plate, and a Mil-Spec AR-15 carbine castle nut. The Gauntlet Arms polymer stabilizing brace in black pairs with the included pistol 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.