Super convenient - Sylvan Arms RAPID ATTACH MOUNTING SYSTEM R.A.M.S QD Picatinny Rail Mount Combo

I prefer these over the standard M lock variety because you can easily move them to different areas on your M lock rail system quickly, which is kind of the purpose of M lock anyway. They do not come off on their own, which is a plus I’ve had some of the cheap M lock stuff come off before. Only reason I give four stars is they are not 100% solid. They do have some play in them so depending on your purpose, they may not be ideal. But for things like a sling or a flashlight, they are perfectly fine. On a vertical four grip they are a little bit sloppy because of the leverage but still usable. I really like it for the QD mount for the sling though. Because I always seem to wanna change the position of my sling.