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

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

This complete .45 ACP AR-45 build kit delivers everything needed to assemble a suppressor-ready pistol platform except the lower receiver. The kit features a 5-inch suppressor-ready barrel with 1:16 twist rate, freefloat M-Lok handguard, and mil-spec components throughout. Ships without a brace, intended for customers selecting their own final configuration.

Key Features

• 5-inch suppressor-ready barrel with .578x28 thread pitch for direct mounting
• Freefloat M-Lok handguard with 4-inch length for ergonomic control
• SBR Ready configuration for custom brace or stock selection
• Complete mil-spec lower parts kit with all internal components
• 9310 alloy steel bolt carrier group with nitride finish for .45 ACP blowback operation
• Mil-spec heavy-duty buffer tube with 8oz buffer and carbine recoil spring
• 4150 CrMoV barrel with phosphate finish and slim profile
• Type 3 Class 2 hardcoat anodized aluminum upper receiver

Perfect For

• Shooters building a compact .45 ACP pistol platform
• Suppressor-ready configurations with direct-thread mounting
• Blowback PCC builders seeking complete component integration
• SBR builds with custom brace or stock selection
• Shooters prioritizing freefloat accuracy and M-Lok modularity

SBR Ready Configuration

This kit ships without a brace and is designed for customers selecting their own final setup. The configuration is based on your specific needs, whether you choose a pistol brace for a pistol configuration or opt for SBR compliance with a stock. All components are compatible with standard AR-15 lower receivers, and the suppressor-ready barrel accepts standard .45 ACP ammunition with proper feeding verification.

Suppressor-Ready Barrel Design

The 5-inch barrel features a .578x28 thread pitch for direct suppressor mounting, eliminating the need for additional adapters. The suppressor-ready design integrates seamlessly with the freefloat handguard and M-Lok rail system. Verify suppressor compatibility before attachment, and ensure secure mounting before operation.

Complete Component Integration

The kit includes a purpose-built 9310 alloy steel bolt carrier group optimized for .45 ACP blowback cycling, paired with a mil-spec heavy-duty buffer tube and 8oz buffer for reliable function. All internal lower parts, recoil spring, castle nut, and end plate are included to complete the lower receiver assembly. Lower receiver not included.

Freefloat M-Lok Platform

The 4-inch freefloat M-Lok handguard provides mounting flexibility for tactical accessories without affecting barrel harmonics. The aluminum construction with M-Lok slots supports rapid configuration changes and modular attachment options. The slim barrel profile maintains compact handling characteristics while supporting suppressor-ready functionality.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable laws. Ships without a brace. Do not install a stock unless compliant with applicable laws. Verify suppressor compatibility before use. Ensure secure mounting before operation.