Back in the day when the WR Agency was in Springfield, MO it was often mentioned that the proper term is, in fact, "hand detachable locks", but "droplock" was also never a stranger in the gunroom there. I used to hang out there during my lunch hours and the occasional Saturday afternoon......much better than a pool hall! I'm still thankful to good old Bob Francis there for my basic training in British doubles years ago. He's a good guy and I wish him well.