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 socketCompact design provides momentary-on and constant-on through a single switchSnap-on clamp allows easy attachment to Picatinny rail