Special-K Grip Designed for use and compatibility with all AR pattern rifles.   Ultra ergonomic design with shorty beaver tail to allow for a more comfortable, choked up grip, giving you more control of the weapons system. Short ledge at the bottom to keep positive grip retention and a stable surface to brace the platform on. 14 degree angle reinforces elbows in posture (no chicken wings). Proprietary diamond texture on all gripping surfaces gives positive control in the worst of conditions (maritime, rain, snow) Corrosion proof hardware included Designed, developed and Made in USA Material:  Nylon 12- excellent resistance to chemicals, including hydraulic fluids, oil, fuels, grease, salt water and solvents, heat resistant to 300+ degrees Weight: 37.5 grams (1.32 oz) Dimensions: 1.84” x 1.17” x 4.05”