The Rail Master MTL is a low profile auxiliary aiming solution for any rail equipped firearm. The MTL can be mounted almost anywhere freeing up valuable rail space for other accessories like a weapon light. It comes complete with Pic Rail and M-LOK adapters. The remote switch has tactile ON/OFF and Momentary ON functions. Backed by the Crimson Trace Crimson Protect limited lifetime warranty this laser sight is a must have for your self defense weapon.