Go Remote. Conserve Space. The CSM-09 lets you remotely activate your SureFire Weapon Light while also conserving space on your weapons rail. It provides reliable and instant momentary-on or constant-on from a single switch; lightly press for momentary-on activation or click through for constant on. The CSM-09s compact durable polymer housing ensures secure attachment to any M-LOK rail. Because its engineered to our uncompromising standards you can trust the CSM-09 to reliably activate your light when you need it. Fits: SureFire Weapon Lights with plug sockets including Millennium Universal Classic Universal Scout Light fitted with socketed tailcap X300 X400 with XT tailcap assembly.