Davidson Defense Short King w/Magpul BTR Brace 8-inch 1:16 .45 ACP AR-45 Freefloat M-Lok Handguard Pistol Full Build Kit

Short King Magpul BTR Brace 8-inch 1:16 .45 ACP AR-45 Freefloat M-LOK Pistol Full Build Kit

The Short King is a .45 ACP AR-45 Full Build Kit built around a compact 8-inch blowback platform. The kit centers on an 8-inch 4150 CrMoV steel barrel with a nitride finish, 1:16 twist rate, and .578x28 thread pitch, paired with a KAK Micro Flash Can and a black 5/8-inch crush washer. The billet pistol caliber AR-15 upper receiver in 6061 aluminum is paired with a 7-inch ultra-lightweight minimalist freefloat M-LOK handguard with no anti-rotation tabs. A complete PCC AR bolt assembly for .45 ACP 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, a Mil-Spec heavy-duty 6-position black buffer tube, an 8 oz buffer, a standard AR-15 carbine recoil spring, an AR-15 M16 Mil-Spec receiver end plate, and an AR-15 carbine castle nut. The Magpul BTR pistol brace in black, compatible with standard Mil-Spec buffer tubes, is included. Lower receiver not included.

Key Features

• 8-inch 4150 CrMoV steel barrel, nitride finish, 1:16 twist, .578x28 thread pitch, .45 ACP
• Blowback platform
• KAK Micro Flash Can, .578x28, black 5/8-inch crush washer included
• Billet pistol caliber AR-15 upper receiver, 6061 aluminum
• 7-inch ultra-lightweight minimalist freefloat M-LOK handguard, no anti-rotation tabs
• Complete PCC AR bolt assembly, .45 ACP
• Mil-Spec AR-15 M4 charging handle
• Complete Mil-Spec AR-15 lower parts kit
• Mil-Spec heavy-duty 6-position black buffer tube
• 8 oz buffer
• Standard AR-15 carbine recoil spring
• AR-15 M16 Mil-Spec receiver end plate
• AR-15 carbine castle nut
• Magpul BTR pistol brace, black, Mil-Spec buffer tube compatible

Perfect For

• AR-45 pistol builders sourcing a complete .45 ACP blowback full build kit with a billet pistol caliber upper, 4150 CrMoV nitride barrel, PCC bolt assembly, and Magpul BTR brace already included, pairing it with their own lower receiver
• Shooters building a compact 8-inch .45 ACP blowback pistol platform who want the bolt assembly, charging handle, KAK Micro Flash Can, and Magpul BTR brace covered in one kit with a Mil-Spec buffer tube
• AR-45 platform builders who want a blowback pistol full build kit with a 4150 CrMoV nitride barrel and complete lower parts kit without sourcing components separately

Barrel and Muzzle Device

The 8-inch barrel is 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 Micro Flash Can. A black 5/8-inch crush washer is included. The blowback platform design addresses the .45 ACP cartridge in a pistol caliber AR-pattern build.

Billet Upper Receiver and Handguard

The billet pistol caliber AR-15 upper receiver is 6061 aluminum and is designed around the .45 ACP blowback platform. The 7-inch ultra-lightweight minimalist freefloat M-LOK handguard features M-LOK attachment points along the body for accessory mounting and no anti-rotation tabs. These two components define the exterior structure of the upper assembly on this AR-45 pistol platform.

Bolt Assembly and Charging Handle

The complete PCC AR bolt assembly is designed for .45 ACP blowback operation. 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. The buffer system includes a Mil-Spec heavy-duty 6-position black buffer tube, an 8 oz buffer, a standard AR-15 carbine recoil spring, an AR-15 M16 Mil-Spec receiver end plate, and an AR-15 carbine castle nut. The Magpul BTR pistol brace in black pairs with the included Mil-Spec buffer tube and covers the rear brace interface for this AR-45 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. Verify compatibility with your specific .45 ACP lower receiver before use.