Great for quick testing but… - Sylvan Arms RAPID ATTACH MOUNTING SYSTEM R.A.M.S QD Picatinny Rail Mount

This is a great option if you have items you want to quickly test with before committing to full installation. In my case I used this to attach a bipod for more stable zeroing on a rifle I have no intention of putting a full time bipod or pic rail on.

Easy on, easy off, but it does have a good amount of play in most rails I own. Nothing has an extremely solid connection. I wouldn’t recommend for anything you will depend on or put regular use into, but if you just want to see is that miscellaneous attachment fits in various spots with easy, this is the tool!