[Hectic]

It'll cost about the same to build a 40+rps gearbox as buy a p* and way less downtime and upkeep/repair costs from shit breaking every bag of bb's or so lol yer best bet is guy some 13:1 ish gears a lonex piston piston head and a cylender head a mosfet and a motor and good battery. After that grab some gear grease and shims and have at it. You may be able to go without the fet and motor and see how it runs to save some money but may as well build it right. That'll run you 30bbsps ish and cost about 250 bucks in parts give or take. Main factor will be motor and gear selection. Shs for 35 bucks or sigtek for like 100. JG motor for like 40 bucks or a lonex or Tienley for more etc..