Davidson Defense Deadlock AR-45 Pistol Build Kit, 7.5-Inch 1:16 45ACP, SBA5 Brace, Freakin45 Suppressor

Deadlock w/SBA5 Brace 7.5-inch 1:16 45ACP AR-45 Quad-Rail Pistol Full Build Kit with Witt Machine The Freakin45 Suppressor

This is a complete .45 ACP AR pistol build kit with everything except the serialized lower receiver. You get a 7.5-inch Bear Creek barrel, free-float quad-rail handguard, SBA5 stabilizing brace, and the Witt Machine Freakin45 ultra-compact suppressor. The included Hughes Precision thread adapter converts the barrel from .578x28 to 5/8x24 for seamless suppressor mounting. This is a full-featured pistol caliber carbine platform ready for assembly.

Key Features

• 7.5-inch 4150 Chrome Moly Vanadium barrel with 1:16 twist rate, optimized for .45 ACP
• Free-float 10-inch quad-rail handguard with anodized aluminum construction
• SB Tactical SBA5 stabilizing brace for improved control and accuracy
• Witt Machine Freakin45 ultra-compact 4-inch suppressor with graphite black Cerakote finish
• Hughes Precision thread adapter for .578x28 to 5/8x24 conversion
• Complete mil-spec lower parts kit, buffer system, and charging handle included
• Billet upper receiver in 6061 aluminum for durability

Perfect For

• Shooters building a suppressed .45 ACP pistol caliber carbine
• Home defense and close-quarters applications
• Shooters seeking compact, maneuverable platform with reduced noise
• Builders wanting a complete kit with minimal additional components needed

Suppressor Integration and Platform Design

The Witt Machine Freakin45 is purpose-built for compact .45 ACP platforms. At just 4 inches, it maintains a low-profile footprint without sacrificing sound reduction. The included Hughes Precision adapter handles the conversion from the barrel's .578x28 thread pitch to the suppressor's 5/8x24 standard, eliminating compatibility concerns. This integrated approach means you're not hunting for adapters or worrying about thread compatibility.

Free-Float Handguard and Quad-Rail System

The 10-inch free-float quad-rail handguard isolates the barrel from the upper receiver, improving consistency and accuracy. Quad-rail mounting gives you multiple attachment points for optics, lights, and accessories without removing the handguard. The anodized aluminum finish resists corrosion and handles suppressed .45 ACP recoil without issue.

Complete Lower Assembly and Brace Configuration

This kit includes a mil-spec heavy-duty carbine buffer tube paired with an 8-ounce pistol-caliber buffer and standard carbine recoil spring. The SB Tactical SBA5 brace mounts directly to the buffer tube and provides stable control during firing. The complete mil-spec lower parts kit covers all internal components, and the mil-spec charging handle and end plate round out the assembly.

What You Need to Know

Lower receiver not included. Suppressor may dropship from Davidson Defense. This is a full build kit, so you'll need to assemble the upper and lower, then attach the brace. The .45 ACP platform is inherently softer shooting than rifle calibers, and the suppressor further reduces recoil impulse. The quad-rail handguard accommodates standard Picatinny rail accessories. Verify your state and local laws regarding pistol braces and suppressors before completing assembly.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included. Ships with SBA5 brace. Verify suppressor compatibility before use. Ensure secure mounting before operation. Use only in accordance with applicable laws.