This is a Pachmayr known as the Grip, model 02921.
Pachmayr Signature Grips feature a unique full wrap-around design and are made from rubber specially formulated for use on semi-automatic pistols. This rubber compound gives them a feel that is unmistakably Pachmayr. Built-in steel inserts ensure they maintain their shape. Signature Grips are the overwhelming choice of competitive shooters and law enforcement personnel alike.
Features:
Black finish
Rubber grips
Steel inserts
Comfortable and improved grip
With backstrap