The ERGO Suregrip AR15/M16 Grip Kit is a simple, ergonomic upgrade for your AR-15. The textured rubber grip ensures a soft, positive grip surface under all conditions, reducing fatigue, and improving comfort. The original ergonomically designed ERGO Grip fits all AR-15/M16 rifles.Features :Fits AR-15 type firearms in .223 and .308Ergonomically correct finger groovesVirtually impervious to oils and solventsComes with The Gapper