LPA, Precision machined, Universal CNC Machined steel, front fiber optic Red serrated ramp sight, .600” in height, with counterbored holes for screwing to barrel. Mounting holes are 1.0” centerline to centerline, holes are .140 in diameter & counterbore is .200” diameter. MF40 can be fitted on most any brand of rifle/shotgun/muzzleloader….etc.