Scopes I used that did not disappoint are Tasco World Class 4-16X and 6-24X, Weaver 6-24, Bushnell 4200 4-16 and 6500 4 1/2-30X50, and Nikon Monarch 3 5-20X44. I had a Nightforce 12-42X56 that had fantastic glass, better than any scope I ever compared it with at the range, but it was too heavy so I sold it without mounting it. Scopes that were a major disappointment were several Burrises, including three 8-32X Signatures, four Swarovski z5 5-25X52, and a Minox ZA 5HD 5-25x56 SF PLEX.