KSC/KWA mp7 problem

[cjboi]

I need help with My ksc mp7 taiwan version. I have to cock the gun twice for it to work (aka fire the BB) and the stock nozzle doesn't sit right (when you pull the nozzle, it doesn't go back all the way in. Sometimes you have to push it in to go all the way in the bolt carrier, I can tell too because the FPS fluctuates hard up and down. I believe it's the molding of the bolt carrier or how its made. The striker tip is not hitting the trigger (lever) set right and the stock nozzle doesnt fit well. Any help could do please help!