NITECORE Picatinni Gun Rail Gunmount, Suitable for: Precise Series, Chameleon Series, SRT7, SRT6, MT25, MT26, MH25 MH40, MT40, P25, MH25, Mh2c, MT1C, MT26. The flashlight is slided into the opening and tightened with a supplied Allan Key. Can install and remove from rail by tightening the screw using your hands only. For a more permanent fixture use a screw driver as well. Ships Out Within One Business Day!