Davidson Defense Mini Sledge 10.5-inch Carbine-Gas 1:24 .450 Bushmaster AR-15 Freefloat Keymod Handguard Pistol Complete Upper Build

Mini Sledge 10.5-inch Carbine-Gas 1:24 .450 Bushmaster AR-15 Freefloat Keymod Pistol Complete Upper

The Mini Sledge is a .450 Bushmaster AR-15 Complete Upper 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 component set.

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

Perfect For

• Builders sourcing a complete .450 Bushmaster AR-15 pistol upper with a billet Panhead upper receiver, 10.5-inch HBAR parkerized barrel, .458 SOCOM and .450 Bushmaster BCG, and 10-inch ultra-slim Keymod freefloat handguard ready to pair with their own lower receiver
• Shooters building a compact 10.5-inch carbine-gas .450 Bushmaster pistol platform who want the BCG and charging handle covered in one complete upper with a billet Panhead upper receiver, KAK .458 compensator, and ultra-slim Keymod freefloat handguard
• AR-15 pistol builders who want a .450 Bushmaster complete upper with a billet Panhead upper receiver, .458 ejection port door, and KAK .458 compensator at 5/8x32 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.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.