The ergonomically designed Right / Left Handed ERGO Grip® fits AR/M4 rifles and features: •Available in Black, Dark Earth, OD Green, and Pink •Ergonomically correct finger grooves •Integrated rear upper extension supports the web of your hand •Superior textured finish improves weapon control •Virtually impervious to oils and solvents •Available in your choice of RIGID or SUREGRIP texture RIGID vs. SUREGRIP ERGO Grips are available in two materials, RIGID and SUREGRIP.Both materials feature the Rhino Hide™ texture. RIGID models are molded into a hard polymer grip for a firm feel while SUREGRIP models feature an overmolded rubber-like surface for a morepositive grip. Both grip styles are designed to help prevent fatigue and enhance weapon control. Each ERGO Grip® comes with ourpatented GAPPER® and uses existing grip hardware for installation.