I bought a Zev slide for my non MOS 17, because I have my own aversion of sending off and never to be seen again for several months or even just one month really.

However if I were to to now send off, I wouldn't be out of a gun because I still have it functional but the only cut I'd be interested in is the MOS cut so I wouldn't be held hostage to just one mounting pattern either.

I may actually do the above, and then sell my Zev slide RMR cut afterwards. Hmmmm....