Davidson Defense Suppressor Ready Lifeline w/SBA5 Brace 5-inch 1:16 45ACP AR-45 Freefloat M-Lok Handguard Pistol Full Build Kit

Suppressor Ready Lifeline w/SBA5 Brace 5-inch 1:16 45ACP AR-45 Freefloat M-Lok Handguard Pistol Full Build Kit

This complete .45 ACP AR pistol kit includes everything except the serialized lower receiver. The suppressor-ready 5-inch barrel features a 1:16 twist rate optimized for .45 ACP, paired with a freefloat M-Lok handguard and SB Tactical SBA5 stabilizing brace. All components are mil-spec quality with a phosphate-finished 4150 CrMoV barrel and hardcoat anodized upper receiver.

Key Features

• Suppressor ready 5-inch barrel with .578x28 thread pitch
• SB Tactical SBA5 stabilizing brace included
• Freefloat M-Lok aluminum handguard for accessory mounting
• 1:16 twist rate optimized for .45 ACP subsonic and standard loads
• PCC bolt carrier group in 9310 alloy steel with nitride finish
• Mil-spec lower parts kit, buffer tube, buffer, recoil spring, castle nut, and end plate included
• 4150 CrMoV barrel with phosphate finish and slim profile

Perfect For

• Shooters building a compact .45 ACP AR pistol platform
• Users seeking suppressor-ready configuration without additional modifications
• Builders wanting a complete kit with all major components except the lower receiver
• Those prioritizing freefloat accuracy and M-Lok accessory flexibility

Suppressor Ready Configuration

This kit ships with all components necessary for suppressor-ready operation. The 5-inch barrel is threaded .578x28 and ready to accept compatible suppressors or muzzle devices. The configuration is optimized for .45 ACP ammunition and delivers the compact profile and handling characteristics of a short-barreled pistol platform. Verify suppressor compatibility with your chosen device before final assembly.

Complete Component Set

The full build kit includes the upper assembly, bolt carrier group, charging handle, lower parts kit, buffer system, and SBA5 brace. This represents everything required to complete a functional .45 ACP AR pistol except the serialized lower receiver. The 6061-T6 aluminum upper receiver features hardcoat anodized finish for durability and corrosion resistance. All mil-spec components are designed for reliable operation in the AR platform.

.45 ACP Performance Platform

The 1:16 twist rate is matched to .45 ACP ballistics for stable flight of standard and subsonic ammunition. The slim profile barrel reduces overall weight while maintaining structural integrity. The freefloat design eliminates handguard contact with the barrel, supporting consistent accuracy. The PCC bolt carrier group is specifically engineered for pistol caliber operation in the AR platform.

M-Lok Accessory Ecosystem

The 4-inch M-Lok handguard provides multiple mounting points for lights, lasers, vertical grips, and other tactical accessories. M-Lok slots are spaced throughout the handguard for flexible configuration. Accessories can be repositioned or swapped without tools or permanent modifications. The aluminum construction maintains lightweight handling while supporting standard mil-spec accessory systems.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable laws. Verify suppressor compatibility before use. Lower receiver not included.