Magneto Mod
Smoktech's Magneto mod is one of the most popular out there, with good reason. It's smooth, reliable magnetic switch won't bind or lose strength with use, and its telescoping body will accommodate batteries from 18350 - 18650. A reverse spin lock ring prevents accidental firing.
Available in gold tone for those Saints fans among you looking to put together a package in black & gold, or to anyone who just appreciates a bit of flash.