Davidson Defense Corestrike 8.5-inch Pistol-Gas 1:8 .300 BLK AR-15 Freefloat Tubular M-Lok Handguard Pistol Upper Build Kit

Davidson Defense Corestrike AR-15 Upper Build Kit - 8.5-inch .300 Blackout Pistol-Gas 1:8 Freefloat Tubular M-Lok Handguard

The Davidson Defense Corestrike is an AR-15 upper build kit chambered in .300 Blackout with an 8.5-inch heavy profile barrel. The kit includes the upper receiver, barrel, handguard, and GI birdcage flash hider. The 7-inch freefloat tubular M-Lok handguard gives the forend a lightweight, compact, accessory-ready profile. A BCG and charging handle are 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. phosphate-finished steel micro low-profile gas block
• 6061-T6 aluminum slick side billet upper receiver, USA made, Type 3 Class 2 hardcoat anodized finish
• 7-inch freefloat tubular M-Lok handguard in aluminum
• GI birdcage flash hider, 5-in-8x24 thread pitch

Perfect For

• AR-15 pistol builders sourcing an upper build kit in .300 Blackout
• Builders pairing an 8.5-inch pistol-gas upper with their own BCG and charging handle
• Shooters running a freefloat tubular M-Lok handguard on a .300 Blackout pistol build
• Builders completing a lightweight .300 Blackout upper assembly

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. phosphate-finished 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, manufactured in the USA. 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 7-inch 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.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. BCG and charging handle are not included.