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

Suppressor Ready Thornfield SBR Ready 5-Inch 1-16 .45 ACP AR-45 Freefloat M-LOK Handguard Pistol Full Build Kit

This is an AR-45 pistol full build kit chambered in .45 ACP, centered on a 5-inch slim profile 4150 Chrome Moly Vanadium 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 aluminum AR-15 pistol caliber upper receiver anchors the front end. The 4.2-inch freefloat M-LOK handguard in black 7075-T6 aluminum with an integrated hand stop covers the compact forend. A PCC AR bolt assembly compatible with .45 ACP and a Mil-Spec M4 charging handle complete the upper side. The lower completion package covers a complete Mil-Spec AR-15 lower parts kit with a Mil-Spec single-stage trigger, Mil-Spec safety selector, standard Mil-Spec magazine catch, bolt catch, pivot pin, and takedown pins, along with an A2 style black textured polymer pistol grip, a Mil-Spec heavy-duty AR-15 6-position buffer tube in black anodized aluminum, an 8 oz. black PCC buffer, a standard AR-15 carbine recoil spring made in the USA, a Mil-Spec AR-15 and M16 receiver end plate, and an AR-15 Mil-Spec carbine castle nut. This kit ships without a brace, leaving the final rear end setup to the buyer. Lower receiver not included.

Key Features

• .45 ACP chambering, 5-inch slim profile 4150 Chrome Moly Vanadium 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 aluminum AR-15 pistol caliber upper receiver
• 4.2-inch freefloat M-LOK handguard, 7075-T6 aluminum, black, integrated hand stop
• PCC AR bolt assembly, .45 ACP compatible
• Mil-Spec AR-15 M4 charging handle
• Complete Mil-Spec AR-15 lower parts kit with Mil-Spec single-stage trigger, Mil-Spec safety selector, standard Mil-Spec magazine catch, bolt catch, pivot pin, and takedown pins, A2 style black textured polymer pistol grip
• Mil-Spec heavy-duty AR-15 6-position buffer tube, aluminum, black anodized
• 8 oz. PCC buffer, black
• Standard AR-15 carbine recoil spring, made in the USA
• Mil-Spec AR-15 and M16 receiver end plate
• AR-15 Mil-Spec carbine castle nut
• SBR Ready

Perfect For

• AR-45 pistol builders who need everything above the lower receiver for a .45 ACP build
• Shooters pairing this kit with an existing stripped or complete AR-45 compatible lower receiver
• Builders selecting their own brace or stock for a custom .45 ACP AR-45 pistol or SBR platform with a suppressor-ready compact upper and Hughes Precision thread adapter already covered

Upper Assembly

The billet aluminum AR-15 pistol caliber upper receiver forms the core of the front end for the AR-45 platform. The 5-inch slim profile 4150 Chrome Moly Vanadium 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. The 4.2-inch freefloat M-LOK handguard in black 7075-T6 aluminum surrounds the barrel along the compact forend with M-LOK slots along the handguard surfaces for accessory attachment and an integrated hand stop built directly into the handguard body.

Bolt Carrier Group and Charging Handle

The PCC AR bolt assembly is the platform-correct bolt assembly for the .45 ACP AR-45 blowback build. The Mil-Spec M4 charging handle pairs with the bolt assembly inside the upper receiver to complete the upper interior and finish the front end of the build.

Lower Completion Components

The complete Mil-Spec AR-15 lower parts kit covers the full internal lower component group, including the Mil-Spec single-stage trigger, Mil-Spec safety selector, standard Mil-Spec magazine catch, bolt catch, pivot pin, and takedown pins, with an A2 style black textured polymer pistol grip covering the grip interface. The Mil-Spec heavy-duty AR-15 6-position buffer tube in black anodized aluminum, 8 oz. black PCC buffer, and standard AR-15 carbine recoil spring made in the USA form the buffer system at the rear of the lower. The Mil-Spec AR-15 and M16 receiver end plate and AR-15 Mil-Spec carbine castle nut lock the buffer tube down cleanly at the rear of the lower receiver. The brace or stock selection is left entirely to the buyer, keeping the final rear end open for a custom setup.

SBR Ready

This kit ships without a brace and is intended for builders selecting their own final rear end setup. The Mil-Spec heavy-duty 6-position buffer tube and complete lower hardware are included, but the brace or stock is sourced separately by the buyer. The final rear end configuration is setup dependent and determined by the component the buyer selects.

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. Verify suppressor compatibility before use. Ensure secure mounting before use. Lower receiver not included.