Original scope was a Hawke Endurance 30mm 4-16x50 with 30mm tube, talley fixed ring mounts. The model 12FV has a leupold vxii 4-12x40 with leupold base and rings. It is chambered in .22-250. Since the one piece mount for the short action model 12 would not fit the 111 I got a pair of leupold bases for the 111 and used the rings from the model 12. The leupold is a one inch tube versus the 30mm on the Hawke. After rezeroing the model 12 I did a box test on the hawke and it passed. Wasn't dead back on zero but a click up and left and it was good to go. it's only a 350 dollar scope so wasn't expecting perfect.