[malice4you]

Two questions about the red piston:

Will a red piston work with a zero trigger, or am I limited to the orange piston?

What is the actual difference between the orange and the red piston? (besides the obvious smartass answer of 'the color')

 

[l4gi]

The back part on both of the pistons can be screwed off. Take metal back part of the orange piston, and put it on the red one. That way the zero trigger will have maximum grip on the piston. This is not a necessity, but extremely recommended.

Ive used a PDI piston with the Laylax zerotrigger. It works, but doesnt do good for the internals of your gun.