This is a TALON Grips Inc Grip known as the Rubber, model 708R.
TALON Grips for Smith & Wesson SD9 and SD40 models. This rear wrap grip is in the rubber texture and offers full side panel coverage including the thumb rest area" full coverage under the trigger guard" and high coverage on the backstrap. This grip has graphic cutouts for the S&W emblem on each side of the firearm.
Features:
Black finish
Durable single piece design provides maximum coverage;Proprietary material is less than 0.5mm thick;Increases control and accuracy