Sorry fellas, I guess my brain was seeing things funny. Fior some reason it took me a third time reading this to realize i was thinking about the slde on a handgun rather than a rifle bolt. Another forum had a person inquire about a handgun he'd bought in which the #s on the slide didn't match those on the frame. I was still in that brain wave before I guess. In a bolt gun where headspacing is a critical safety factor, ys, defianyely get this checked out. it may be fine but bettersafe than sorry with firearms.