Pearce Grip Frame Insert for Glock Gen 4 20/21/41, Black Polymer - PGFI21G4

This grip frame insert is designed for Glock Gen 4 models 20, 21, and 41, installing in the bottom rear cavity of the frame using the lanyard hole for retention. Constructed of high-impact polymer, it prevents dust and debris intrusion while providing a finished appearance, and is compatible with or without factory interchangeable backstraps.