Davidson Defense 45ACP AR-45 Tubular SBR Ready Pistol Full Build Kit + Witt Machine Freakin45

45ACP AR-45 Tubular SBR Ready Pistol Full Build Kit + Witt Machine Freakin45

The 45ACP AR-45 Tubular SBR Ready Pistol Full Build Kit pairs a 5-inch 4150 CrMoV barrel with a free-float handguard and includes a Witt Machine Freakin45 suppressor. This kit delivers the components needed to complete a lower receiver into a functioning .45 ACP pistol platform. Lower receiver not included.

Key Features

• 5-inch 4150 CrMoV barrel with 1:16 twist rate and 37/64x28 thread pitch, Parkerized finish
• 6061-T6 billet pistol caliber upper receiver with precision machining
• 7-inch free-float smooth handguard for reduced vibration and improved shot grouping
• Witt Machine Freakin45 suppressor, 4 inches long, graphite black Cerakote finish
• PCC AR bolt assembly optimized for .45 ACP blowback operation
• Complete mil-spec lower parts kit with all internal components
• Mil-spec heavy-duty 6-position buffer tube, standard carbine recoil spring, and 8 oz buffer
• AR-15 M4 mil-spec charging handle and carbine castle nut
• Hughes Precision thread adapter for seamless suppressor integration

Perfect For

• Shooters building a compact .45 ACP pistol platform
• Users seeking an SBR-ready configuration without a brace
• Suppressed shooting enthusiasts with existing suppressor setup
• Builders wanting a complete parts solution minus the lower receiver
• Pistol caliber carbine shooters preferring .45 ACP ballistics

SBR Ready Configuration

This kit ships without a brace and is configured for shooters who intend to select their own final setup based on their specific needs and compliance requirements. The SBR Ready design means you have full flexibility in choosing whether to add a stabilizing brace, a stock, or run it as a pistol, depending on your jurisdiction and intended use. Configuration choices remain entirely with the builder.

Witt Machine Freakin45 Suppressor Integration

The included Witt Machine Freakin45 suppressor is a purpose-built .45 ACP suppressor measuring 4 inches in length with a graphite black Cerakote finish. The suppressor uses a 5/8x24 thread pitch, and the kit includes a Hughes Precision thread adapter to match the barrel's 37/64x28 thread pitch. This adapter ensures secure, compatible mounting between the barrel and suppressor. The suppressor's compact design complements the 5-inch barrel for a balanced, manageable platform.

Free-Float Handguard and Barrel Stability

The 7-inch free-float smooth handguard isolates the barrel from external pressure, allowing the barrel to vibrate naturally without contact to the handguard. This design reduces shot-to-shot variance and improves consistency, particularly valuable in a precision-focused build. The handguard provides adequate rail space for mounting optics or accessories without adding unnecessary weight.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included. BCG and charging handle are included. Ships without a brace. Do not attach a stock unless compliant with applicable laws. Verify suppressor compatibility before use. Ensure secure mounting before operation. Use only in accordance with applicable laws.