Davidson Defense Short King 8-inch 1:16 .45 ACP AR-45 Freefloat M-Lok Handguard Pistol Complete Upper Build

Davidson Defense Short King 8-inch .45 ACP AR-45 Freefloat M-Lok Complete Upper

The Davidson Defense Short King is a .45 ACP AR-45 Complete Upper built around a compact 8-inch platform. The kit centers on a Gashkin 8-inch medium profile barrel in 4150 CrMoV steel with a nitride finish, 1:16 twist rate, and .578x28 thread pitch, paired with a KAK .578-28 Micro Flash Can muzzle device. The upper receiver is a 6061 pistol caliber billet design in 6061-T6 aluminum with a Type 3 Class 2 hardcoat anodized finish, paired with a freefloat M-Lok handguard in aircraft-grade aluminum in black. A PCC AR bolt assembly for .45 ACP in 9310 alloy steel with a nitride finish and a Mil-Spec AR-15 M4 charging handle complete the upper component set.

Key Features

• Gashkin 8-inch medium profile barrel, 4150 CrMoV steel, nitride finish, 1:16 twist, .578x28 thread pitch
• KAK .578-28 Micro Flash Can, .45 ACP, .578x28
• 6061 pistol caliber billet upper receiver, 6061-T6 aluminum, Type 3 Class 2 hardcoat anodized
• Freefloat M-Lok handguard, aircraft-grade aluminum, black
• PCC AR bolt assembly, .45 ACP, 9310 alloy steel, nitride finish
• Mil-Spec AR-15 M4 charging handle

Perfect For

• Builders sourcing a complete .45 ACP AR-45 upper ready to pair with their own lower receiver
• Shooters building a compact .45 ACP pistol platform who want the BCG and charging handle already included
• AR-45 builders who want a Gashkin barrel and PCC bolt assembly covered in one complete upper

Gashkin Barrel and Muzzle Device

The Gashkin barrel is 8 inches, chambered in .45 ACP, and constructed from 4150 CrMoV steel with a nitride finish. The twist rate is 1:16 and the thread pitch is .578x28, which matches the included KAK .578-28 Micro Flash Can. At 8 inches this barrel keeps the overall upper compact while covering the front end from muzzle device to upper receiver.

Upper Receiver and Handguard

The upper receiver is a 6061 pistol caliber billet design in 6061-T6 aluminum with a Type 3 Class 2 hardcoat anodized finish. The freefloat M-Lok handguard is aircraft-grade aluminum in black, providing M-Lok attachment points along the rail body for accessory mounting. These two components define the exterior structure of the upper assembly on this AR-45 platform.

PCC Bolt Assembly and Charging Handle

The PCC AR bolt assembly is spec-matched to .45 ACP and constructed from 9310 alloy steel with a nitride finish. A Mil-Spec AR-15 M4 charging handle is included to complete the upper component set. These two parts cover the upper internal components beyond the barrel and handguard.

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