The Starfall 18-inch AR-15 .450 Bushmaster Rifle Upper Build Kit from Davidson Defense is engineered for durability and reliable performance across various shooting applications. This upper build kit features an 18-inch HBAR barrel made from 4150 Chrome Moly Vanadium steel, finished with a phosphate coating for added resilience. The barrel's mid-length gas system and a twist rate of 1:24 ensure accuracy and consistent operation.
The upper receiver is crafted from 7075-T6 forged aluminum and finished in anodized black, providing a robust foundation for assembly. It includes a large ejection port for .450/.458 cartridges and is paired with a KAK .458 compensator for efficient muzzle management. The kit also includes a 15-inch M-LOK free float extended quad rail handguard in black, allowing for versatile accessory attachment. This upper build kit is ideal for gunsmiths who appreciate precision and performance in a compact rifle solution.
Caliber: .450 Bushmaster
Barrel Material: 4150 Chrome Moly Vanadium
Barrel Thread Pitch: 5/8x32
Barrel Gas System Length: Mid-Length
Barrel Length: 18 inches
Barrel Finish: Phosphate
Barrel Profile: HBAR
Barrel Twist Rate: 1:24
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
Gas Block Size: 0.75
Muzzle Device: KAK .458 Compensator
Muzzle Thread Pitch: 5/8x32
Handguard Style: Free Float Extended Quad Rail
Handguard Color: Black
Handguard Style: 15” M-LOK Free Float Extended Quad Rail Handguard
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