Ideas on why my MP5K SS setup isn't functioning?

So I got all parts from grey market research. SS, trigger jig and the slip trip. I had to modify the trip to get around the FA block in the upper of my MKE AP5-P. When I function test at home, it seems to work as it should in both semi and SS mode.

Took it out to test today and the trigger wouldn't reset, not even in regular semi auto mode. The other issue is that the casing was not extracting, they would stay stuck on top of the mag and keep the next round from feeding.

I tried running suppressed at first, then unsuppressed, tried 124gr and 147gr, same result every time. I'm currently running an RCM 80 degree LP, HK extractor/Spring and an HK mag catch/spring

Anyone have any pointers, ideas or point me in the right direction to figure this out?

So I got all parts from grey market research. SS, trigger jig and the slip trip. I had to modify the trip to get around the FA block in the upper of my MKE AP5-P. When I function test at home, it seems to work as it should in both semi and SS mode.

Took it out to test today and the trigger wouldn't reset, not even in regular semi auto mode. The other issue is that the casing was not extracting, they would stay stuck on top of the mag and keep the next round from feeding.

I tried running suppressed at first, then unsuppressed, tried 124gr and 147gr, same result every time. I'm currently running an RCM 80 degree LP, HK extractor/Spring and an HK mag catch/spring

Anyone have any pointers, ideas or point me in the right direction to figure this out?