The Coldfire 8.5-inch Pistol-Gas Complete Upper is engineered for the AR-15 platform, featuring a robust 1:8 twist .300 BLK barrel that measures 8.5 inches in length. Crafted from 4150 Chrome Moly Vanadium steel, this heavy-profile barrel is finished with a durable Parkerized coat and includes a 5/8x24 thread pitch for compatibility with a variety of muzzle devices. The Pistol gas system optimizes reliability and performance.
The upper receiver is constructed from 7075-T6 aluminum, anodized for enhanced durability, and features M4 feed ramps. It is fitted with a freefloat M-Lok handguard made from aluminum, offering flexibility in mounting accessories. The assembly includes a micro low-profile gas block and a mil-spec AR-15 M4 charging handle. The complete build is complemented by a Nitride finished bolt carrier group made from 9310 alloy steel, ensuring functionality and longevity in critical applications.
Barrel: 8.5" .300 Blackout AR-15 Heavy Barrel, Pistol Gas, 1:8T, 5/8x24
Caliber: .300 Blackout
Barrel Length: 8.5 inches
Barrel Material: 4150 Chrome Moly Vanadium
Barrel Thread Pitch: 5/8x24
Barrel Gas System Length: Pistol
Barrel Profile: Heavy
Barrel Twist Rate: 1:8
Barrel Finish: Parkerized
Upper Receiver: AR-15 Upper Receiver, M4 Feed ramps, 7075 T6 Aluminum, Anodized
Upper Receiver Material: 7075-T6 Aluminum
Upper Receiver Finish: Anodized
Handguard Material: Aluminum
Handguard Color: Black
Handguard Style: M-Lok
Gas Block Size: 0.75
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
Charging Handle: AR-15 M4 Charging Handle Mil-Spec Quality
Bolt Carrier: AR-15 5.56/.223/.300/.350 Complete Bolt Carrier Group *Made In The USA*
Bolt Carrier Material: 9310 Alloy Steel
Bolt Carrier Finish: Nitride
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