Davidson Defense Warden SBR Ready 10.5-inch Carbine-Gas 1:7 556 AR-15 Freefloat KeyMod Handguard Pistol Full Build Kit, DTT Plan B Bartizan Muzzle Brake

Warden SBR Ready 10.5-inch Carbine-Gas 5.56 AR-15 Freefloat KeyMod Pistol Full Build Kit

This SBR ready full build kit delivers a complete 5.56 AR-15 platform with a 10.5-inch 4150 CrMoV barrel, 7075-T6 aluminum upper receiver, and freefloat. KeyMod handguard. The kit includes a carbine-length gas system, adjustable gas block, bolt carrier group, charging handle, lower parts kit, buffer system components, and a DTT Plan B Bartizan muzzle brake. Lower receiver not included.

Key Features

• 10.5-inch 4150 CrMoV barrel with 1:7 twist rate and 1/2x28 threads
• 7075-T6 aluminum upper receiver with M4 feed ramp and anodized finish
• Freefloat 10-inch KeyMod handguard for modular accessory mounting
• SBR Ready configuration ships without a brace
• Carbine-length adjustable gas block for reliable cycling
• DTT Plan B Bartizan muzzle brake with modular suppressor mounting compatibility
• Complete bolt carrier group made in the USA with 9310 alloy steel and nitride finish
• Mil-spec lower parts kit, buffer tube, buffer, recoil spring, castle nut, and end plate included

Perfect For

• Shooters building a compact 5.56 platform for home defense or tactical training
• Builders selecting their own brace or stock configuration for legal compliance
• Shooters wanting modular suppressor mounting through the Plan B ecosystem
• Carbine-gas AR-15 builds with rapid follow-up shot capability

SBR Ready Configuration

This kit ships without a brace to accommodate shooters selecting their own final configuration. The platform is designed for builders who want flexibility in choosing a brace, stock, or other setup based on their legal requirements and intended use. Configuration decisions rest with the end user and must comply with all applicable federal, state, and local laws. The freefloat design and adjustable gas block support both suppressed and unsuppressed operation.

Plan B Modular Ecosystem

The included DTT Plan B Bartizan muzzle brake integrates into the. Plan B modular mounting system, allowing quick-change suppressor attachment without tools. This ecosystem approach simplifies suppressor swaps while maintaining secure mounting and alignment. The 1/2x28 thread pitch is standard for 5.56 platforms and supports a wide range of compatible accessories and suppressors.

Complete Kit Components

This full build kit includes everything needed to complete a lower receiver assembly except the serialized lower receiver itself. The package contains a complete bolt carrier group, charging handle, lower parts kit with all internal components, carbine buffer tube, standard 3-ounce buffer, carbine recoil spring, castle nut, end plate, and forward assist assembly. All major components are mil-spec compatible and designed for reliable operation.

Barrel and Gas System

The 10.5-inch 4150 CrMoV barrel features a government profile, phosphate finish, and 1:7 twist rate optimized for a wide range of 5.56 ammunition weights. The carbine-length stainless steel gas tube pairs with a low-profile adjustable gas block to meter gas reliably across suppressed and unsuppressed configurations. This combination supports both standard and subsonic ammunition cycling.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable laws. Lower receiver not included. Ships without a brace. Do not install a stock unless compliant with applicable laws. Verify suppressor compatibility before use. Ensure secure mounting before operation.