Davidson Defense Rock Crawler w/SBA3 Brace 10.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat Keymod Handguard Pistol Full Build Kit

Davidson Defense Rock Crawler AR-15 Pistol Full Build Kit - 10.5-inch, 5.56 NATO, Carbine Gas, Freefloat Keymod Handguard, SB Tactical SBA3 Brace

The Davidson Defense Rock Crawler is a 5.56 NATO AR-15 pistol full build kit built around a USA-made 6061-T6 billet aluminum slick side upper receiver with a Type 3 Class 2 hardcoat anodized finish and anti-rotation cutout. The kit includes a 10.5-inch government profile Needle barrel in 416R stainless steel with a polished stainless finish, a 1:7 twist rate, and a 1/2x28 thread pitch, a 10-inch Ultra-Slim freefloat Keymod handguard in black 6061-T6 aluminum, a micro low-profile 0.750 carbine gas block, a GI Birdcage flash hider at 1/2x28, a nitride-finished 9310 alloy steel bolt carrier group compatible with 5.56 and .223 and .300 and .350, a Mil-Spec M4 charging handle, an SB Tactical SBA3 black adjustable pistol stabilizing brace, a Mil-Spec heavy-duty 6-position buffer tube, a 3 oz standard carbine buffer, a standard carbine recoil spring, a Mil-Spec receiver end plate, and a castle nut. The Needle barrel, freefloat Keymod handguard, and slick side billet upper receiver form the complete upper assembly, while the BCG and charging handle complete the upper cycling component set. The SBA3 brace, Mil-Spec buffer tube, and buffer system cover the rear end of the build. Lower receiver not included.

Key Features

• USA-made 6061-T6 billet aluminum slick side upper receiver, Type 3 Class 2 hardcoat anodized finish, anti-rotation cutout
• 10.5-inch government profile Needle barrel, 416R stainless steel, polished stainless finish
• 5.56 NATO
• 1:7 twist rate
• 1/2x28 thread pitch
• Carbine gas system
• Micro low-profile 0.750 gas block
• 10-inch Ultra-Slim freefloat Keymod handguard, 6061-T6 aluminum, black
• GI Birdcage flash hider, 1/2x28
• 9310 alloy steel bolt carrier group, nitride finish, 5.56 and .223 and .300 and .350 compatible
• Mil-Spec M4 charging handle
• SB Tactical SBA3 black adjustable pistol stabilizing brace
• Mil-Spec heavy-duty 6-position buffer tube
• 3 oz standard carbine buffer
• Standard carbine recoil spring
• Mil-Spec receiver end plate
• Castle nut
• Lower receiver not included

Perfect For

• AR-15 pistol builders sourcing a complete 5.56 NATO full build kit with the SBA3 brace in a compact 10.5-inch carbine configuration
• Shooters pairing this kit with an existing AR-15 lower receiver
• Builders looking for a compact 5.56 NATO pistol build kit with a polished stainless Needle barrel and slick side billet receiver

Needle Barrel and Gas System

The Needle barrel is a 10.5-inch government profile unit in 416R stainless steel with a polished stainless finish, chambered in 5.56 NATO with a 1:7 twist rate and a 1/2x28 thread pitch. The carbine-length gas system pairs with a micro low-profile 0.750 gas block to cover the gas regulation side of the upper. A GI Birdcage flash hider at 1/2x28 rounds out the muzzle end.

Upper Receiver and Handguard

The USA-made 6061-T6 billet slick side upper receiver features a Type 3 Class 2 hardcoat anodized finish and an anti-rotation cutout, forming the structural core of the upper assembly without a forward assist or dust cover. The 10-inch Ultra-Slim freefloat Keymod handguard is 6061-T6 aluminum in black, surrounding the barrel without contact and providing Keymod mounting positions for compatible accessories.

Bolt Carrier Group and Charging Handle

The included bolt carrier group is 9310 alloy steel with a nitride finish, compatible with 5.56, .223, .300, and .350 platforms. The BCG and Mil-Spec M4 charging handle work together to cycle the action and complete the upper side component set.

Brace and Buffer System

The SB Tactical SBA3 black adjustable pistol stabilizing brace is included with a Mil-Spec heavy-duty 6-position buffer tube. The buffer system consists of a 3 oz standard carbine buffer and a standard carbine recoil spring. A Mil-Spec receiver end plate and castle nut complete the rear hardware included with this full build kit.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included.