Mil-spec sometimes aint Mil-spec or even in spec. The Culprit.

If you have an AR that doesn't lock back on the empty mag this might contribute to you problem. you might want to see this vid.sometimes Mil-spec don't mean It is in spec. Omega tactical sent me a new part I will install and do another function/mag check with the parts. Hats off to Omega tactical had me replacement parts in my had in 3days at no cost to me.