Davidson Defense Mandate 7.5-inch 1:16 .45 ACP AR-45 Freefloat M-Lok Handguard Pistol Upper Build Kit

Mandate 7.5 Inch 45 ACP AR-45 Freefloat M-Lok Handguard Pistol Upper Build Kit

This upper build kit pairs a Bear Creek 7.5 inch 45 ACP barrel with a 7 inch freefloat M-Lok handguard and features a Vertex Enhanced Pistol Caliber billet upper receiver. Designed for compact 45 ACP builds, it includes a KAK Industry 45 ACP compensator and a 750 gas block.

Key Features

• Bear Creek 7.5 inch barrel in 4150 CrMoV steel with 1:16 twist rate, parkerized finish, and 578x28 thread pitch optimized for 45 ACP
• Vertex Enhanced Pistol Caliber billet upper receiver in 6061 aluminum with anodized finish
• 7 inch freefloat M-Lok handguard in 6061-T6 aluminum with black finish
• KAK Industry 45 ACP compensator with 578x28 thread pitch reduces muzzle rise
• 750 gas block pairs with pistol length gas system for compact cycling

Perfect For

• Builders creating compact 45 ACP pistol platforms
• Shooters requiring M-Lok accessory mounting
• Custom builds prioritizing billet upper construction and lightweight handguard design

Platform and Caliber Configuration

This kit is built for AR-45 lower receivers chambered in 45 ACP. The 1:16 twist rate stabilizes 45 ACP projectiles at pistol velocities, and the 578x28 thread pitch matches 45 ACP muzzle device standards. The Vertex billet upper receiver uses pistol caliber geometry compatible with 45 ACP Colt pattern magazines.

Gas System and Barrel Profile

The 7.5 inch barrel uses a pistol length gas system with a 750 gas block positioned for short barrel cycling. The M4 contour balances weight and rigidity in a compact profile. Parkerized finish on the 4150 CrMoV steel provides corrosion resistance and wear protection.

Handguard Design

The 7 inch freefloat M-Lok handguard extends nearly to the muzzle device, maximizing accessory mounting space while maintaining a compact overall length. The 6061-T6 aluminum construction keeps weight manageable without sacrificing structural integrity. Black finish coordinates with the upper receiver anodizing.

BCG and charging handle are not included. Verify compatibility with your lower receiver and magazine system. Follow safe handling and manufacturer instructions. Ensure compliance with all applicable laws.