The CSM-09 enables you to remotely activate your SureFire Weapon Light while saving space on your weapon’s rail. It provides reliable, instant momentary-on or constant-on operation from a single switch-lightly press for momentary activation or click through for continuous lighting. The CSM-09’s compact, durable polymer housing ensures a secure fit on any M-LOK rail. Built to SureFire’s high standards, you can trust the CSM-09 to reliably turn on your light when needed.