GLOCK GEN 4 : PG-G4SC
GLOCK Sub Compact Size Model Grip Frame Insert
This unit installs in the bottom rear cavity of the frame utilizing a friction fit for retention. Fits model 26, 27, 33, and 39. This product will only fit new Generation 4 frames. Allows for use of factory interchangeable backstraps.
Helps keep debris out of the magazine well.