This is a VZ Grips Revolver Grip known as the Tactical Diamond, model KLF-TD-BG-RB.
The Tactical Diamonds are the response to those who like the texture of a traditional Double Diamond grip but don't like the big diamond pattern around the screw holes. Keep in mind these are very grippy due to the fact that VZ Grips can cut the diamond pattern a lot sharper in the G10.
Features:
Texture: Medium
Frame Size: S&W K/L