>>6535072For performance remove locks and air restrictor.
After that look into springs. I dunno what blasters it shares springs with but I got a 5kg something in mine. I've heard it can take more but I don't know.
All of that is really basic though. The problem is that only a few people work on that blaster because lever action for the nerf brand is an underperforming gimmick that is outclassed by the (extinct) buzzbee sentinel.
You've got a lot of work ahead of you if you actually want to make that blaster a true heavy hitter.