Davidson Defense Corestrike w/SBA5 Brace 8.5-inch Pistol-Gas 1:8 .300 BLK AR-15 Freefloat Tubular M-Lok Handguard Pistol Full Build Kit

Davidson Defense Corestrike AR-15 Pistol Full Build Kit with SB Tactical SBA5 Brace - 8.5-inch .300 Blackout Pistol-Gas 1:8 Freefloat Tubular M-Lok Handguard

The Davidson Defense Corestrike with SB Tactical SBA5 Brace is an AR-15 pistol full build kit chambered in .300 Blackout with an 8.5-inch heavy profile barrel. The kit includes the upper assembly, bolt carrier group, charging handle, SB Tactical SBA5 pistol stabilizing brace, mil-spec heavy-duty 6-position buffer tube, 3 oz carbine buffer, mil-spec receiver end plate, lower parts kit, and all associated buffer system hardware. The lower receiver is not included.

Key Features

• 8.5-inch 4150 Chrome Moly Vanadium steel heavy profile barrel
• Parkerized barrel finish
• 1:8 twist rate
• 5-in-8x24 thread pitch
• Pistol-length gas system with .750 O.D. steel micro low-profile gas block
• 6061-T6 aluminum slick side billet upper receiver, Type 3 Class 2 hardcoat anodized finish
• Freefloat tubular M-Lok handguard in aluminum
• Complete bolt carrier group with 9310 alloy steel bolt head and 8620 alloy steel body, nitride finish
• Mil-spec M4 charging handle
• GI birdcage flash hider, 5-in-8x24 thread pitch
• SB Tactical SBA5 pistol stabilizing brace in nylon reinforced polymer, black
• Mil-spec heavy-duty 6-position buffer tube
• 3 oz carbine buffer
• Mil-spec receiver end plate

Perfect For

• AR-15 pistol builders sourcing a complete kit around an 8.5-inch .300 Blackout upper
• Builders completing a stripped mil-spec AR-15 lower receiver
• Shooters running a freefloat tubular M-Lok handguard on a .300 Blackout pistol build
• Builders adding an SB Tactical SBA5 brace to an AR-15 pistol build

Barrel and Gas System

The 8.5-inch heavy profile barrel is 4150 Chrome Moly Vanadium steel with a Parkerized finish and a 1:8 twist rate suited for both subsonic and supersonic .300 Blackout loads. The muzzle is threaded at 5-in-8x24 and pairs with the included GI birdcage flash hider. The pistol-length gas system uses a .750 O.D. steel micro low-profile gas block, which sits beneath the handguard and keeps the forend profile clean and unobstructed.

Upper Receiver and Handguard

The slick side billet upper receiver is 6061-T6 aluminum with a Type 3 Class 2 hardcoat anodized finish. The slick side profile removes the forward assist and ejection port door provisions found on standard upper receivers, giving the build a cleaner exterior profile. The freefloat tubular M-Lok handguard is aluminum in black, keeping the forend lightweight and compact with M-Lok accessory slots for lights, grips, and other attachments. The handguard length is shorter than the 8.5-inch barrel, and the muzzle device extends beyond the handguard to provide the necessary clearance.

Bolt Carrier Group and Charging Handle

The included bolt carrier group is a complete AR-15 unit with a 9310 alloy steel bolt head and an 8620 alloy steel body, finished in nitride. It is compatible with .300 Blackout, 5.56 NATO, .223 Remington, and .350 Legend configurations. The mil-spec M4 charging handle completes the upper component set.

SB Tactical SBA5 Brace and Buffer System

The SB Tactical SBA5 pistol stabilizing brace is nylon reinforced polymer in black and pairs with the included mil-spec heavy-duty 6-position buffer tube. The 3 oz carbine buffer, mil-spec receiver end plate, lower parts kit, and all associated buffer system hardware cover the core lower completion components outside the serialized lower receiver.

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