Product DescriptionThe Pearce Grip PGFI21G4 Grip Frame Insert installs into the bottom rear cavity of select Glock Generation 4 frames, using the pistol's lanyard hole for positive retention. Molded from durable, high-impact polymer, it helps keep dust and debris out of the grip cavity while providing a clean, finished look to the frame. Designed for Glock Gen4 20/21/41 frames, it also allows use with or without the factory interchangeable backstraps.Product Highlights Grip frame insert (frame plug) designed for Glock Generation 4 full-size frames Installs in the bottom rear cavity and uses the lanyard hole for secure retention High-impact polymer construction in black for durability and a factory-finished appearance Helps keep dust and debris out of the open grip cavity Compatible with factory interchangeable backstraps (use with or without installed backstraps)Specs Brand: Pearce Grip Manufacturer Part Number: PGFI21G4 UPC: 605849200101 Product Type: Grip frame insert / frame plug Compatibility: Glock Gen4 20/21/41 frames Material: Polymer (high-impact polymer) Color: Black Retention Method: Uses lanyard holeDisclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product's manufacturer.