Davidson Defense Full House 10.5" 5.56 AR-15 Pistol Kit, Drop-In Trigger Ready, KeyMod, w/ SBA3 Brace

Full House 10.5" 5.56 AR-15 Pistol Kit, Drop-In Trigger Ready, KeyMod, w/ SBA3 Brace

This Davidson Defense Full House kit gives you everything needed to build a compact 5.56 NATO pistol platform except the lower receiver. The 10.5-inch barrel delivers the velocity you need in a package that's genuinely maneuverable. The nitride finish protects against corrosion, and the drop-in trigger design means you're not wrestling with complicated trigger group assembly. The SBA3 brace provides a stable platform for one-handed or two-handed shooting, and the KeyMod handguard lets you attach accessories exactly where you want them.

Key Features

• 10.5-inch 4150 CrMoV barrel with nitride finish and 1:8 twist rate
• M4 profile upper receiver with M4 feed ramps and anodized aluminum construction
• 10-inch KeyMod handguard for customizable accessory mounting
• SB Tactical SBA3 adjustable pistol stabilizing brace included
• Drop-in trigger ready design simplifies assembly
• Carbine length gas system with low-profile gas block
• Complete bolt carrier group with nitride finish
• AR-15 Lite lower parts kit with mil-spec buffer tube and components
• GI birdcage flash hider with crush washer

Perfect For

• Builders creating a compact 5.56 NATO pistol platform
• Shooters wanting a complete kit without the serialized lower receiver
• Those seeking a maneuverable short-barrel configuration
• Builders who prefer drop-in trigger systems over traditional trigger group installation

Drop-In Trigger Ready Design

The kit ships configured for drop-in trigger compatibility, which means you can install an aftermarket trigger without modifying the lower receiver. This approach eliminates the need to disassemble a traditional trigger group, making assembly more straightforward for builders who want a faster build process. The design maintains full mil-spec compatibility with standard AR-15 lower receivers.

Carbine Length Gas System Performance

This configuration uses a carbine length gas tube paired with a low-profile gas block sized for the 0.75-inch barrel. The carbine system is tuned for 10.5-inch barrels and delivers reliable cycling with standard 5.56 NATO ammunition. The low-profile design keeps the rail system clean and unobstructed for optic mounting and accessory placement.

SBA3 Brace and Accessory Compatibility

The SB Tactical SBA3 provides an adjustable stabilizing platform with multiple length-of-pull positions. The brace is designed for shooters who want ergonomic control without traditional stock functionality. The KeyMod handguard supports a wide range of tactical accessories, including lights, grips, and rail-mounted systems. The 1/2x28 muzzle device threads accept suppressors or other muzzle attachments rated for this thread pitch.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included. Verify local regulations before assembly and use, as pistol configuration legality varies by jurisdiction.