I was using mine on a 17. From the looks of your pic, the light sits farther forward on them, placing the switch out of reach.
“The enemy is anybody who's going to get you killed, no matter which side he is on.” - Joseph Heller
Beware of associating with "Cheap" Squirrels. They tend to be very narrow minded, hypocritical, and will gag you if you question or disagree. ;)