Davidson Defense Deadlock AR-45 Quad-Rail Pistol Full Build Kit, 7.5-Inch 1:16 45ACP, BTR Brace

Deadlock w/BTR Brace 7.5-Inch 1:16 .45 ACP AR-45 Quad-Rail Pistol Full Build Kit with Witt Machine Freakin45 Suppressor

This is a complete AR-45 pistol build kit designed for shooters who want a compact, suppressor-ready platform in .45 ACP. It includes everything except the lower receiver, with a 7.5-inch barrel, free-float quad-rail handguard, Magpul BTR brace, and the Witt Machine Freakin45 ultra-compact suppressor pre-installed with a Hughes Precision thread adapter. The kit uses a Bear Creek 4150 Chrome Moly Vanadium barrel with a 1:16 twist rate optimized for .45 ACP, paired with a pistol-caliber blowback bolt carrier group and mil-spec lower parts kit. All components ship in black anodized finish with parkerized barrel.

Key Features

• 7.5-inch Bear Creek barrel in 4150 Chrome Moly Vanadium with 1:16 twist and parkerized finish
• Free-float 10-inch quad-rail handguard with barrel nut for accuracy and accessory mounting
• Magpul BTR brace with standard mil-spec buffer tube compatibility
• Witt Machine Freakin45 4-inch ultra-compact suppressor with Hughes Precision thread adapter included
• Complete mil-spec lower parts kit with 8 oz. pistol-caliber buffer and carbine recoil spring
• Mil-spec charging handle and receiver end plate

Perfect For

• Shooters building a compact .45 ACP pistol platform with integrated suppression
• Users who want a suppressor-ready kit without additional thread adapter purchases
• Builders seeking a free-float handguard for accessory flexibility
• Those prioritizing compact profile and reduced noise in a pistol-caliber platform

Suppressor Integration and Ecosystem

The Witt Machine Freakin45 suppressor arrives pre-configured with a Hughes Precision thread adapter that converts the barrel's .578x28 thread pitch to 5/8x24 standard. This setup eliminates the need for separate adapter purchases and ensures proper mounting compatibility. The ultra-compact 4-inch design pairs well with the 7.5-inch barrel for a balanced overall profile while maintaining effective noise reduction. The suppressor's graphite black Cerakote finish matches the kit's black anodized components.

Quad-Rail Handguard and Accessory Mounting

The 10-inch free-float quad-rail handguard provides four full Picatinny rails for mounting lights, lasers, grips, and other tactical accessories. Free-float design means the handguard doesn't contact the barrel, preserving accuracy potential. The 6061-T6 aluminum construction with anodized finish resists corrosion and integrates cleanly with the billet upper receiver. Rail space allows for forward-mounted optics, pressure switches, and backup sights without interference.

.45 ACP Platform Specifics

This kit uses pistol-caliber blowback operation optimized for .45 ACP cartridges. The 1:16 barrel twist rate stabilizes 230-grain and heavier projectiles common in .45 ACP loads. The 8 oz. pistol-caliber buffer and standard carbine recoil spring are tuned for reliable cycling with subsonic and standard-pressure .45 ACP ammunition. The Bear Creek barrel's M4 contour balances weight and durability for a compact pistol platform.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included. Verify compatibility before use. Ensure secure mounting before operation. Use only in accordance with applicable laws. May Dropship from Davidson Defense.