Hmmm thats weird that this issue is happening... My only guess is thay the bolt lock tab is stuck in the "lock" position. THAT! or you may have to do some grinidng the to the part of the bolt catch that contacts with the bolt carrier itself ... Most likley not .... When the you put the mag in dry fire mode does the little tab fall down? If ao i think the tab is jumping and pushing the bolt catch up ... If this is the case try putting in a bit of a stiffer spring maybe? Let me know.
Also from my personal experience ... The OB is no more than a cool factor ... My OB kit causes nothing but problems ... From ROF issues to the bolt catch. Ot working to the bb's not leavin the barrel... My CB kit on the other hand has worked %100 everytime never fails i have had dirt and crap and god knows what else caked in the fire mechanism as well as the BCG and the gun still fired great. And yes upgrading to steel parts is a good idea ... I would let te original parts wear out and then do steel internals ... Word of warning though you may have to do some minor filing to those steel parts to get the gun to fire right ... Just means project time with a dremel
