I recently purchased an entry level long range target scope. The dealer said it was a 30mm scope, looked like a 34mm scope to me. When I measure the tube I get slightly more than 35mm. Has anyone ever heard of a 35mm scope. The brand is Sight Mark, box says triple duty 6-25x56 riflescope. Any info about this scope would be appreciated. I have it on a trial and have 60 days to return it, but the dealer is 150 mi. from me. I'm wanting to put it in lower rings than the ones that came with the scope.