Now of course, if anyone will admit to using them is a whole nother smoke. lol I was wondering if this kind of picatinny mount with quick detachable base for $7.50 shipped on Ebay is any good. (?) I already have it on an AR15. Yea, I own DD, Colt, Troy, LMT, LaRue and other top snob name hardware when it counts, but didn't know if simple stuff like this works well enough. (?) I already have this mount and 2 swivels on my 9lb AR15 and have pulled on the 2 swivels and base as a test. It seems a bit wiggly but doesn't pull loose. (but I'm not sure how much slack I'm supposed to feel) Is that a good enough test? Anybody have first hand experience with QD swivels failing. Yea, I'm suspicious about $7 stuff too but just as soon not pay $50-$75 for the 2 parts if it's not necessary. Edited To Add; Never mind guys. I googled "Quick Detachable Sling Swivel reliability, problems?" and didn't like the feedback about machining tolerances being all over the place and rifles crashing loose to the ground. It seems even quality stuff can vary a lot! I'll stick with simple Fudd style Detachable Sling Swivels made by USA GrovTec which will NOT pull loose in that solid alum block. Thanks for the input. I'm going with the items in the above 2 photos instead!