My friend has a new PCC 9mm rifle with the following specifications.
Spikes Tactical lower
Unkown manufacture 16 inch barrel/bolt/ upper
Arma Spec. one piece captured buffer rated at equivalent weight of 5.4oz. (Note - the installation of this part required the removal of the bolt weight)
Timmy PCC trigger left as is from the factory - approximately 3.2 lbs pull weight
ETS and Glock magazines - both had same issue
Anti walk pins
124 grain Top Gun ammunition rated at 1050 FPS out of a 5 inch barrel
The gun seemed to work for a few rounds, then the trigger seemed not reset, with some manually ejected unfired rounds having a very slight firing pin strike mark, hardly enough to see. Then the gun began going full auto.
Any ideas on where to start to solve this issue?
Thanks for the help.