Excellent engineering & quality - Armasight Night Vision Monocular Quick Release Picatinny Mount Adapter

This thing is really nice. Both releases are independently adjustable and allow for quick mounting and removing. The releases hold the rail nice and tight so that the adapter is held completely immovable. It's a high quality piece of equipment. Could be seen as somewhat expensive but considering what you're mounting on it, I'd say it's not going to bother you that much. Buy with confidence!