Which piston to use?

[Defcon_Carl]

Hi, I was wondering what is the difference between a full-teeth vs a half-teeth piston. I'm not sure what to buy, i was wanting to upgrade my mp5j. And which brand would you prefer?

Thanks,
Carl

[dpvu]

You'll need the full-teeth version. Half-teeth are only required for special helical gear sets.

[ILLusion]

Originally Posted by dpvu

You'll need the full-teeth version. Half-teeth are only required for special helical gear sets.

Partially incorrect.

Half-tooth pistons are only required for half-tooth gear sets, which are of extremely high torque varieties.

Examples are:

- Systema Ultra Torque Up
- Systema Infinite Torque Up
- Prometheus MAX Torque.

These gear sets also happen to have helical teeth, but that is not the reason why you need a half tooth piston. There are plenty of other helical tooth gear sets that run fine with full-tooth pistons.

[dpvu]

Yeah, sorry if that caused any confusion. That's what I meant when I said "special helical gear sets".