Guys I haven't been having any luck getting another T/C 4194 peep sight for my Hawken flinter but I can get a Williams GPRS sight for it. Now I know the GM barrels have Williams sights and are only held in place with one screw. But I don't really want to put the peep that far forward. My question is, for those that have this sight: Is the screw size the same for the hole on top of the barrel at the breech area the same thread as the rear. If so, that is where I would like to mount the sight? Anyone know for sure?