This is a TALON Grips Inc Grip known as the Rubber, model 108R.
TALON Grips for Glock Model 42. This rear wrap grip is in the rubber texture. This grip has full coverage on the side panels including above the thumb rest" high coverage on the backstrap" and full coverage under the trigger guard. This grip includes the graphic "GLOCK" cutout on the shooter's left and the TALON "T" on the shooter's right as well as relief cuts for the thumb rest on each side.
Features:
Black finish
Durable single piece firearm specific design provides maximum coverage
Top quality fit and finish
Increases control and accuracy