I bought the SM7701 from Sun Optics USA. (Made in China)Not a fan. The whole setup seemed rather chintzy to me. Of course I had planned on using the mount on my HW90........Back in the package it went, oughtta return it instead of leaving it sitting here. I am far from an expert, but when I look at this mount I think it would be suitable for a low power springer or something with very light recoil.And like Roadworthy I also saw a screw/threaded rod that would sit too high and be into the scope. The entire thing just seemed like something that might have been a good idea but they never really tested it? Or I got an old one that was sitting on a shelf.