The ergonomically enhanced Ergo Tactical Deluxe Grip fits AR/M4 rifles and features the same grip features as the Original Ergo Grips but in a heavier textured version. - Same grip features as our original Ergo Grips but in a wider heavier textured design - Ambidextrous palm swell provides shooters with proper trigger finger placement - An A2 sized inner cavity that is capable of storing many kit systems available on the retail market - Ambidextrous - Fits: multi-caliber AR's such as .223 5.56 300 Whisper/Blackout 50 Beowulf and others. (Will not fit large frame AR's such as 7.62 and .308 caliber.)