(screws 4/40 x 1 1/4" fillister head) (center to center = 35.05mm/1.380") O.S. .40-.46 FP & LA (bolt through) Enya 40XZ-TN & 40XZS Evolution .40NX Jett .40L Magnum .40-.44GP ThunderTiger GP .42 & .46 Webra .40 RC (non-Speed)