The Coldfire 8.5-inch Pistol-Gas 1:8 .300 BLK AR-15 Freefloat M-Lok Handguard Pistol Upper Build Kit is crafted for precision and reliability. It features an 8.5-inch heavy barrel made from 4150 Chrome Moly Vanadium with a pistol gas system and a 1:8 twist rate, making it compatible with .300 Blackout ammunition. The barrel includes a 5/8x24 thread pitch for suppressor attachment or muzzle devices, and its parkerized finish ensures durability.
The upper receiver is constructed from 7075-T6 aluminum with anodized finish, incorporating M4 feed ramps for improved round feeding. Accompanied by a freefloat M-Lok handguard measuring 7 inches, this kit offers a lightweight yet robust design, providing versatility and mounting options for accessories. The kit includes a micro low-profile gas block and a GI birdcage flash hider, completing an upper assembly that meets the needs of the modern gunsmith.
Barrel: 8.5" .300 Blackout AR-15 Heavy Barrel, Pistol Gas, 1:8T, 5/8x24
Platform: AR-15
Caliber: .300 Blackout
Barrel Length: 8.5"
Barrel Material: 4150 Chrome Moly Vanadium
Barrel Gas System Length: Pistol
Gas Block Size: 0.75
Barrel Profile: Heavy
Barrel Twist Rate: 1:8
Barrel Finish: Parkerized
Barrel Thread Pitch: 5/8x24
Barrel Extension Finish: Nitride
Handguard Material: Aluminum
Handguard Length: 7 inches
Handguard Style: M-Lok
Handguard Color: Black
Handguard Mounting System: Partial Picatinny Section (Top Only)
Free Float: Yes
Upper Receiver: AR-15 Upper Receiver, M4 Feed Ramps, 7075 T6 Aluminum, Anodized
Upper Receiver Material: 7075-T6 Aluminum
Upper Receiver Finish: Anodized
Gas Block: Micro Low-Profile Gas Block, .750 O.D Barrel Steel
Muzzle Device: AR-15 TPI GI Birdcage Flash Hider for .308 7.62x39 .300 Blackout
Muzzle Thread Pitch: 5/8x24
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