The Frostfang 18-inch AR-15 .450 Bushmaster rifle upper build kit from Davidson Defense delivers precision and durability for your AR-15 platform. Chambered in .450 Bushmaster, this build kit features an 18-inch HBAR barrel made from 4150 Chrome Moly Vanadium steel, finished with a phosphate coating for resilience. The barrel's 1:24 twist rate and mid-length gas system ensure reliable cycling and accuracy.
Constructed from 7075-T6 forged aluminum, the stripped upper receiver is anodized in black for added durability and corrosion resistance, featuring a large ejection port. The kit includes a 15-inch M-Lok handguard that allows for versatile mounting options and is paired with a low-profile 0.75 gas block. The muzzle is equipped with a KAK .458 compensator, threaded 5/8x32, to manage recoil effectively. The Frostfang build kit combines quality components and reliable performance, making it an excellent choice for any gunsmith seeking freedom and precision in their build.
Caliber: .450 Bushmaster
Barrel Material: 4150 Chrome Moly Vanadium
Barrel Thread Pitch: 5/8x32
Barrel Gas System Length: Mid-Length
Barrel Length: 18-inch
Barrel Finish: Phosphate
Barrel Profile: HBAR
Barrel Twist Rate: 1:24T
Barrel Name: "Sepal" 18" .450 Bushmaster 1-24T 4150 CMV Phosphate Steel HBAR
Upper Receiver Material: Machined from 7075-T6 forged aluminum
Upper Receiver Finish: Anodized Black
Upper Receiver Name: Stripped Upper Receiver .450/.458, Large Ejection Port
Handguard Style: M-Lok
Handguard Color: Black
Handguard Length: 15-inch
Gas Block Size: 0.75
Gas Block Name: Recoil Technologies Micro Low-Profile Gas Block for .750 O.D Barrel Steel
Muzzle Device Name: KAK .458 Compensator 5/8-32 COMP-5/8-32-458
Muzzle Thread Pitch: 5/8x32
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