UTG Model M4/AR15 Ergonomic Pistol Grip -OD Green. New Gen Ergonomic Pistol Grip with Palm Swell, Thumb Rest, Non-slip Texture & Plug. Ergonomic Finger Grooves Provide Solid and Repeatable Grip. Additional Hand Support Provides Stable and Easy Trigger Control. Very Well Designed to Offer Great Comfort and Increase Shooting Performance and Accuracy.