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I recently picked up a used ICS M16 (Thanks again, Psycho). As I was fully aware at the time of purchase, the gun was non-functioning. The primary reason for this was a stripped spur gear. Due to this, I decided to make multiple inexpensive upgrades while replacing the gears. Unfortunately, after I had the rifle fully assembled, the tappet plate would not properly cycle. It appears as if the tappet plate will start in the forward position (fully seated into the hop-up unit), but after the first shot the nozzle will not return to this position. My first thought was that the tappet was binding between the sector gear and the gearbox shell; however, when i close the gearbox (before firing it) i'm able to easily push the nozzle in and the spring easily pushes it back out. Additionally, it seems like every time I open the rifle, the gears are facing up which is pulling back the tappet plate. My first thought was that I was dealing with over-spin; however, that seems highly unlikely on such a strong spring with a stock motor. I've scoured the internet and I have not been able to find this specific issue. My part list is below. Gears: ZCI 13:1 Motor: ICS 3000 Mosfet: Nukefet Battery: 3000mah 7.4V (20C) (also tried 1000 mah 11.1v 20C) Spring: Guarder M120 (also tried stock spring) Cut-Off Lever: Stock (I assume) ARL: ICS (stock) Tappet Plate: SHS V2 Nozzel: SHS AK (long) Cylinder Head: SHS V2