I don't know that it's a result of the mail order (Midway) or the maker (Talley) but I had a less than satisfactory experience with a Talley detachable mount. In thinking it over I think the problem was the handled screw that replaces the hexhead screw, thus making the mount detachable had a small bend in the threads. It probably could have been corrected by taking a thread cutter and just chasing the threads- about a five minute operation. The symptoms were: It was a two piece mount. for the "permanent" attachment the clip on the base was held tight with the hexhesd, which to make it detachable, the hexhead was replaced with the lever screw. So two bases, each base had the choice of two screws. Total four screws. Three of the four screws threaded into the base as smooth as honey, but the fourth, a levered one had a lot of resistance from the very start. putting grease on it and twisting in and back a few times reduced the energy needed to turn it in but still no where near as easy as the other three. on contacting Midway I was told that since I had tried to screw it in, that I had damaged the base and therefore the warrantee was invalid. So they wouldn't accept the bases/ring back. So now the bases and rings set in a box with the other "spare" stuff. The bases and rings on the rifle are Leupold Quick detachable rings, which work well. Needless to say, I didn't buy the Leupold bases and rings from Midway.