The Original ERGO Grip, designed for performance by creating a better interface between the shooter and firearm, ERGO Grip is still the standard by which positive grip and shooter comfort are measured. The ERGO Grip comes with the proprietary Gapper for increased comfort and Installation Hardware PackFeatures:Fits AR-15 type firearms in .223Small shelf on left side of grip for thumbErgonomically correct finger groovesIntegrated rear upper extension supports the web of your handSuperior Rhino Hide texture improves weapon controlVirtually impervious to oils and solventsOvermolded SUREGRIP material with original texture.ERGO SURE GRIP rubber textureComes with The GapperIncludes Installation Hardware Pack (additional packs can be purchased here)Weight 0.28 lbsDimensions 20 A- 2 A- 10 inAvailable Colors: Black, Dark Earth, OD Green