Davidson Defense Mini Sledge 10.5-inch Carbine-Gas 1:24 .450 Bushmaster AR-15 Freefloat Keymod Handguard Pistol Full Build Kit, SBR Ready

Mini Sledge 10.5-inch Carbine-Gas 1:24 .450 Bushmaster AR-15 Freefloat Keymod Pistol Full Build Kit, SBR Ready

The Mini Sledge is a .450 Bushmaster AR-15 Full Build Kit configured for the SBR Ready designation, 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 Mil-Spec heavy-duty 6-position aluminum carbine 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. 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 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
• Mil-Spec heavy-duty 6-position aluminum carbine 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
• SBR Ready configuration

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, and 10-inch ultra-slim Keymod freefloat handguard already included, pairing it with their own lower receiver and selecting their own rear brace or stock
• Shooters building a compact 10.5-inch carbine-gas .450 Bushmaster pistol platform who want the BCG, charging handle, and complete buffer system covered without a rear interface commitment
• 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 in an SBR Ready configuration 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.

SBR Ready Configuration

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 Mil-Spec heavy-duty 6-position aluminum carbine 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. 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.