HUNTER 450 BUSHMASTER 18" COMPLETE UPPER
CALIBER: 450 BUSHMASTER
BARREL: 18" 416 SS 1/24 TWIST MEDIUM CONTOUR
BCG: 450 NITRIDE
MUZZLE DEVICE: APF 450 BRAKE
GAS SYSTEM: MID LENGTH
HAND GUARD: APF 15.5 MLOK
Just bought and sighted in this upper with my Leupold ultraslam scope , once I had it sighted in I was shooting at 100 yards with three bullet holes touching each other . Very happy !