I bet it's the mag, I had the same problem with an empty mag, switched the bolt stop twice thinking that was the problem. Switched mags, problem solved.
:ROFL:
I got a better idea seeing how you must have misunderstood SMFH. How about you don't play with the alleged AR seeing how it's not yours & maybe minding your own business instead of starting a thread in which you added 4 tags for some reason ( first time I've seen that) You writing an...