Davidson Defense Suppressor Ready Coldharbor 5-inch 1:16 45ACP AR-45 Freefloat M-Lok Handguard Pistol Upper Build Kit

Suppressor Ready Coldharbor 5-Inch 1-16 .45 ACP AR-45 Freefloat M-LOK Handguard Pistol Upper Build Kit

This is an AR-45 upper build kit chambered in .45 ACP, built around a 5-inch slim profile 4150 CrMoV steel barrel with a Parkerized finish, a 1-16 twist rate, and a direct blowback system with no gas tube or gas block. The barrel is threaded at 37-64x28 and includes a Hughes Precision thread adapter converting from .578x28 RH female to 5-8x24 RH male for standard suppressor and muzzle device compatibility. The billet AR-15 PCC upper receiver with a black anodized finish anchors the front end. The Air Lite Series Honeycomb 4-inch freefloat M-LOK handguard with a monolithic Picatinny top rail covers the compact forend. BCG and charging handle are not included.

Key Features

• .45 ACP chambering, 5-inch slim profile 4150 CrMoV steel barrel, Parkerized finish
• 1-16 twist rate, 37-64x28 thread pitch
• Hughes Precision thread adapter, .578x28 RH female to 5-8x24 RH male, included
• Direct blowback operation, no gas tube or gas block
• Billet AR-15 PCC upper receiver, black anodized
• Air Lite Series Honeycomb 4-inch freefloat M-LOK handguard, monolithic Picatinny top rail

Perfect For

• AR-45 pistol builders sourcing a .45 ACP upper assembly without BCG or charging handle
• Shooters adding a compact suppressor-ready 5-inch .45 ACP upper to an existing lower with a compatible PCC bolt assembly and charging handle on hand
• Builders who want a 5-inch .45 ACP slim barrel and Air Lite Honeycomb M-LOK handguard with the Hughes Precision thread adapter already included in one compact upper kit

Upper Receiver and Barrel

The billet AR-15 PCC upper receiver with a black anodized finish forms the core of the front end for the AR-45 platform. The 5-inch slim profile 4150 CrMoV steel barrel brings a Parkerized finish and a 1-16 twist rate to the .45 ACP chamber, threaded at 37-64x28. The included Hughes Precision thread adapter converts the 37-64x28 barrel thread to a 5-8x24 RH male output, allowing standard suppressor and muzzle device options threaded in 5-8x24 RH to thread directly onto this upper. This upper operates on a direct blowback system, meaning there is no gas tube or gas block present or required on this upper. The Air Lite Series Honeycomb 4-inch freefloat M-LOK handguard surrounds the barrel along the compact forend with a monolithic Picatinny top rail for optics and accessory mounting and M-LOK slots along the remaining handguard surfaces in a honeycomb pattern for accessory attachment and material reduction.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Verify suppressor compatibility before use. Ensure secure mounting before use. BCG and charging handle are not included.