Pearce Grip Grip Frame Insert for M&P Shield 9mm and .40 Caliber Features: If you are concerned about dirt and debris filling the cavity of your M&P Shield pistol then this Pearce Grip M&P Shield grip frame insert is just what you need. Designed from high impact resistant polymer this grip frame insert utilizes a friction fit design which secures it into the frame of the M&P Shield. This grip frame insert will help keep debris out of the magazine. Pearce Grip Grip Frame Insert for M&P Shield 9mm and .40 Caliber Specifications: Pearce Grip PG-FIMPS Grip Frame Insert Friction Fit Helps keep debris out of the magazine well High Impact Polymer Matte Black Smith & Wesson M&P Shield, 9mm Luger and .40 S&W Only Does not fit M&P Shield .45 ACP. Does not fit M&P Full Size or M&P Compact models.