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

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

The Davidson Defense Corestrike is an AR-15 complete upper chambered in .300 Blackout with an 8.5-inch heavy profile barrel. The complete upper includes the upper receiver, barrel, handguard, bolt carrier group, and charging handle. A bolt carrier group and charging handle are 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 upper receiver, Type 3 Class 2 hardcoat anodized finish
• 7-inch freefloat tubular M-Lok handguard in aluminum
• Complete bolt carrier group in 9310 alloy steel, nitride finish
• Mil-spec M4 charging handle
• GI birdcage flash hider, 5-in-8x24 thread pitch

Perfect For

• AR-15 pistol builders sourcing a complete upper in .300 Blackout
• Builders pairing an 8.5-inch pistol-gas upper with a stripped lower receiver
• Shooters running a freefloat tubular M-Lok handguard on a .300 Blackout build
• Builders looking for a complete upper with bolt carrier group included

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 upper receiver is 6061-T6 aluminum with a Type 3 Class 2 hardcoat anodized finish. 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.

Bolt Carrier Group and Charging Handle

The included bolt carrier group is a complete AR-15 unit built from 9310 alloy steel with a nitride finish. 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.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.