this handle came as a spare with one of my rifles. I was never sure if it should be on the rifle or if the mismatched serial numbered one should more properly be there. the knob looks like cast steel and is a separate piece from the handle root itself. . Is it a repaired one, a reclaimed ex-sniper one, or did Bubba just di a good job of welding and fitting? I put a magnet on it and it is all steel. Seems like a lot of trouble for Bubba to go to, but one never knows. BTW, the bidy of the handle appears to be Ishevsk, and has no serial number. The rifle is Ishevsk as well.