Davidson Defense Shortshot 300 BLK AR-15 Full Build Kit with Gauntlet Arms Brace & Suppressor

Shortshot w/Gauntlet Arms Brace 4.5-inch 1:7 300 BLK AR-15 M-Lok Pistol Full Build Kit, Witt Machine The Dirty .30 Suppressor

This is a complete .300 Blackout AR-15 pistol platform built around a 4.5-inch 1:7 twist barrel paired with a free-float M-LOK handguard and included Witt Machine The Dirty .30 suppressor. The upper receiver is precision 7075-T6 aluminum with M4 feed ramps and forward assist. Everything you need to complete a lower receiver is included, making this a true full build kit ready for immediate configuration.

Key Features

• 4.5-inch Bear Creek Arsenal barrel, 1:7 twist, micro gas system for subsonic .300 Blackout optimization
• 7075-T6 upper receiver with anodized finish and complete forward assist assembly
• Free-float 7-inch M-LOK aluminum handguard with 1.77-inch internal diameter for optics and accessory mounting
• Complete bolt carrier group, charging handle, lower parts kit, buffer tube, buffer, recoil spring, castle nut, and end plate included
• Witt Machine The Dirty .30 suppressor in 416 stainless steel with graphite black cerakote finish, 5/8x24 thread pitch
• Adjustable skeletonized gas block with .750-inch journal diameter for tuning
• Mil-spec fire control group and standard AR-15 pistol grip included
• Polymer stabilizing brace in black

Perfect For

• Shooters building suppressed .300 Blackout pistol platforms for subsonic ammunition
• Users wanting a complete kit with integrated suppressor included
• Builders seeking a free-float M-LOK setup for precision and accessory flexibility
• Operators running short-barrel .300 Blackout configurations with hearing protection

Micro Gas System Optimization for Subsonic Performance

The 4.5-inch barrel with 1:7 twist rate is purpose-built for .300 Blackout subsonic ammunition. The micro-length gas system cycles reliably with subsonic loads while keeping the overall footprint compact. The adjustable gas block allows you to tune cycling characteristics based on your ammunition selection and suppressor configuration.

Witt Machine The Dirty .30 Suppressor Integration

The included Witt Machine The Dirty .30 suppressor is a 416 stainless steel design with graphite black cerakote finish. At 4 inches long with 5/8x24 threading, it's optimized for .30 caliber subsonic loads and integrates seamlessly with the supplied barrel. The suppressor is ready to mount once your lower receiver is completed.

Complete Build Kit Component Breakdown

This full build kit includes the upper assembly, bolt carrier group, charging handle, lower parts kit, buffer tube, standard carbine buffer, recoil spring, castle nut, and end plate. The lower receiver is not included. All components are mil-spec compatible and designed to work together without modification.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included. BCG and charging handle are not included in the upper assembly alone. Verify compatibility before use. Ensure secure mounting before operation. Use only in accordance with applicable laws. May Dropship from Davidson Defense.