P* F2 Not Feeding

Rifle converted to f2 engine. It stopped feeding after 3 months of use so i just replaced it with a mtw and never got around to diagnosing it or anything and am now selling of all my old airsoft stuff. I dont have batteries anymore to test it but last time it was used engine seemed to work but it just didnt feed. It does have a maxx hop unit in (m4 f2 version). The stock and handguard are from a novritch ssr4. Can come and look/test it if you are local and have batteries and air