hitmanNo2 Posted Sunday at 14:55 Share Posted Sunday at 14:55 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? Link to comment Share on other sites More sharing options...
Speedbird_666 Posted Sunday at 15:28 Share Posted Sunday at 15:28 I am no NGRS expert - but there is a switch on the BTC Spectre board for what appears to be the bolt stop mechanism. I would also refer to this video with regards to how the mechanism works in the GB with the BTC Mosfet: Link to comment Share on other sites More sharing options...
hitmanNo2 Posted Sunday at 15:42 Author Share Posted Sunday at 15:42 Ah. Thanks. I'll check that out. Link to comment Share on other sites More sharing options...
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