The Modular System is made up of 1 Finger Groove Insert (PG1911-1) and 1 Side Panel Grip (PG1911-2). This all-rubber grip system provides a secure and more repeatable grip on the Government Model 1911. The ultra slim black rubber side panel has a slight palm swell giving the user a more positive hold while reducing the overall width. It has the classic double diamond checkering pattern of the 1911 Government model. The Finger Groove Insert fits under any GM 1911 side panel grip adding rubber front finger grooves for comfort and better handling. The side portion of the grip is only 1mm thick, so the overall width is only minimally affected.