The USM G2 is a universal gun sight mounting that requires no modifications to the weapon and offers a stable and secure mounting platform over the frame. The Picatinny universal sight mount from FAB Defense will work with most pistols that have a Picatinny-type accessory rail on the frame. The mount is made of aluminum for a strong but lightweight mount. The mount also adds a lower accessory rail in place of the original one that was used for the installation.