For easy WeaponLight activation without compromising grip on the weapon Ambidextrous dual momentary and constant-on push/toggle switch Models to fit a wide variety of common semiautomatic pistol models For surgical control when using an X-Series WeaponLight (X300, X400), the DG grip switch uses a minimal center-mounted pad. This allows the operator to activate the light with finger pressure without needing to move a finger from the grip. Sig Sauer P229R and P320 Full Size, FN 5.7