Slip-on handgun grips which contribute to accuracy and speed of target acquisition and make shooting a handgun a more pleasant experience by providing a comfortable, secure grip; and by isolating a shooter's thumb from impact and reducing shock, muzzle jump, twist, and recoil when the handgun is fired. The grip is fabricated from a stretchable elastomeric material. This material plus breakaway technology, external grooving, and a thumb-isolating tab maximize the enumerated benefits.