Trigger switch ideas?

[oaklandaviator]

I have an AR-15 handgrip for a throttle on my RV-8 and am adding a smoke system. I’d like to have the switch on the throttle but want something that fits the motif. Any ideas on a switch that would be similar to a trigger? Would have to mount on the bottom of the handgrip since as a throttle the hand position is reversed from the gun position.

Thanks!

 

[Clayvt]

Remote pressure pad like those used in weapon mounted lights or IR aiming lasers?
Not usually on the pistol grip but many guys taped the pressure pads to a verticle grip.
The surefire SR-07 has momentary and an on-off button.