Picatinny Mount Remote Switch For WeaponLightsThe Surefire CSP-09 lets you remotely activate your SureFire WeaponLight while also conserving space on your weapon's 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 CSP-09's compact durable polymer housing ensures secure attachment to any Picatinny rail. Because it's engineered to our uncompromising standards you can trust the CSP-09 to reliably activate your Scout Light when you need it. Fits: SureFire WeaponLights with plug sockets including Millennium Universal Classic Universal Scout Light fitted with socketed tailcap X300 X400 with XT tailcap assembly. Reliable remote activation for any SureFire WeaponLight with a switch socket Compact design provides momentary-on and constant-on through a single switch Snap-on clamp allows easy attachment to Picatinny rail