Davidson Defense Blemished Containment 7.5-inch 1:16 .45 ACP AR-45 Freefloat Quad-Rail Handguard Pistol Upper Build Kit

Blemished Containment 7.5 Inch 45 ACP AR-45 Freefloat Quad-Rail Handguard Pistol Upper Build Kit

This upper build kit pairs a Bear Creek 7.5 inch 45 ACP barrel with a 7 inch freefloat quad-rail handguard and features a blemished Davidson Defense 9mm billet upper receiver. Designed for compact 45 ACP builds, it includes a KAK Industry 45 ACP compensator and 5/8 inch crush washer. The blemished finish on the upper receiver may show minor cosmetic imperfections that dont affect function.

Key Features

• Blem upper receiver may show cosmetic imperfections that dont affect dimensional tolerances or function
• Bear Creek 7.5 inch barrel in 4150 CrMoV steel with 1:16 twist rate, phosphate finish, and 578x28 thread pitch optimized for 45 ACP
• 7 inch freefloat quad-rail handguard in 6061-T6 aluminum with Type III hard coat anodizing and black finish
• Blem Davidson Defense 9mm billet upper receiver in 6061 aluminum with minor cosmetic variations
• KAK Industry 45 ACP compensator with 578x28 thread pitch and phosphate finish reduces muzzle rise
• 5/8 inch crush washer in black included

Perfect For

• Builders creating compact 45 ACP pistol platforms on a budget with quad-rail accessory mounting
• Shooters prioritizing function over cosmetic finish on the upper receiver
• Custom builds requiring multiple rail surfaces for lights, lasers, and vertical grips

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 billet upper receiver uses 9mm geometry compatible with 45 ACP Colt pattern magazines.

Barrel Profile

The 7.5 inch barrel features an M4 contour that balances weight and rigidity in a compact profile. Phosphate finish on the 4150 CrMoV steel provides corrosion resistance and wear protection.

Handguard Design

The 7 inch freefloat quad-rail handguard extends nearly to the muzzle device, providing four continuous Picatinny rail surfaces for maximum accessory mounting flexibility. The 6061-T6 aluminum construction with Type III hard coat anodizing offers rigid attachment points for lights, lasers, vertical grips, and other rail-mounted accessories. Black finish coordinates with the upper receiver.

Blemished Upper Receiver

The blemished designation indicates minor cosmetic imperfections on the upper receiver that dont affect dimensional tolerances or function. This may include finish variations, light scratches, or minor machining marks. The billet construction maintains precision fit with standard components.

BCG and charging handle are not included. The blemished upper receiver may show cosmetic imperfections that dont affect function. Verify compatibility with your lower receiver and magazine system. Follow safe handling and manufacturer instructions. Ensure compliance with all applicable laws.