I have Ernest"s impact, & have been looking for a more powerful scope, well Friday I purchased the Hawke on the yellow for I think a pretty good deal , BNIB for $ 339 pay paled &shipped, but I need rings , there is a set on ebay for $ 22 shipped , they are quick connect, I would buy if they will work BTW they are 30mm weaver & the scope is 30 mm , I just don't know if the scope will have enough clearance on the impact, & will probably also try it on my colibri h/bird, thanks for any help I can get , roger