NEW PEARCE GRIP GEN 4 GLOCK 26 27 33 39 Grip Extension AND Cavity Insert PG-26G4 & PG-G4SC Grip Extension and Cavity Insert for Glock Gen4 Models 26, 27, 33, 39 Manufacturer: Pearce Grip Finish/Color: Black Fit: GLK Gen4 26,27,33,39 Manufacturer Part #: PG-26G4, PG-G4SC