Pearce Grip Frame Insert Fits Glock Gen4 20/21/41 Black PG-FI21G4 Description This unit installs in the bottom rear cavity of the frame/grip, utilizing the lanyard hole for retention. Compatible with Glock 20, 21 and 41. Will ONLY fit Generation 4 frames. Made of a high impact polymer, this insert is designed to keep out dust and debris as well as finish off the overall look of the frame. Allows for use with or without of the factory interchangeable backstraps. Finish/Color: Black. Type: Grip frame insert. Manufacturer Part : PG-FI21G4. Features: This unit installs in the bottom rear cavity of the frame/grip, utilizing the lanyard hole for retention Type: Grip frame insert Compatible with Glock Gen4 20, 21, 41 Made of a high impact polymer, this insert is designed to keep out dust and debris as well as finish off the overall look of the frame Allows for use with or without of the factory interchangeable backstraps Product Details: Brand: Pearce Grip Material: Polymer Color: Black Item Package Dimensions L x W x H: ‎3.4 x 2.7 x 1.2 inches Package Weight: ‎0.02 Pounds Brand Name: ‎Pearce Grip Color: ‎Black Material: ‎Polymer Part Number: ‎4334041890 Date First Available: December 30, 2014