The Fenix GL06-365 is a compact weapon light that features a maximum output of 600 lumens and 459ft (140m) beam distance which allows you to easily spot your target no matter how dark it is. Specifically designed for compact pistols, this gun light will fit select pistols with barrel lengths of 4” or longer. It will not fit 3” sub-compact models. The GL06-365 model fits SIG SAUER® P365, P365X, P365-380, P365XL, P365 SAS, and possibly any other type of firearm that shares that same rail type. Patented quick-release structure and dual tactical tail switches provide users with fast and easy operation. GL06-365 compact weapon light compatibility Will not fit brands other than SIG SAUER unless that brand has the same type of rail system Made specifically to fit the SIG SAUER P365, P365X, P365-380, P365XL, P365 SAS SIG SAUER P365-XMACRO.