This is a Hogue Pistol Grip known as the HandAll Universal, model 17003.
Hogue's Handall Universal Slip On Rubber Grip sleeves are scientifically designed and patented with an innovative shape that hugs the contours of your firearm giving them the tightest and most secure fit possible. Molded from their modern" soft" but durable rubber" Handall grip sleeves are easily installed and provide years of dependable service. Soft textured rubber slips on to improve your grip. Fits large frame autos" not intended for handguns with grip safeties.
Features:
Handall Universal Grip
Full Size Sleeve
Finger grooves
Cobblestone texture
Ambidextrous palm swells
Fits Many Full Size Semi Auto Handguns