Hi,
I'm looking for a gun tech recommendation ideally in the Nottingham area (or failing that, wider East Midlands).
I have a G&P Sentry M4 with a V2 gearbox. It sheared a spur gear, which I replaced along with the piston and hasn't been quite right since (I suspect that's down to me missing something obvious).
I took it to a gun tech in Sheffield to service it but was less than impressed with the state it came back in, and now only getting about 70fps, so it desperately needs some TLC.
Your help and advice would be greatly appreciated.
