I have a TM NGRS M4 that continues to shoot despite an empty mag tripping the bolt catch. All my mag springs seem fine, they immediately pop the bolt catch on empty. However, even with bolt catch activated, it will still fire.
It has a BTC Spectre Mosfet fitted. Is this likely to be the culprit? Does a sensor on it replace some factory function? I thought it was a 100% mechanical system. Is that not the case?
Any ideas?