Hogue AR15 beavertail grip with finger grooves features:
 
Gentle palm swells fit comfortably in hand
Finger grooves naturally position fingers for optimal grip
Textured with Hogue's famous Cobblestone pattern for an efficient non-slip, non-irritating stippled grip
Beavertail™ cushions the hand on recoil and offers increased hand comfort higher on the frame
Made from long-lasting, durable, thermoplastic elastomer that ages gracefully for years of service
Virtually impervious to all oils and solvents associated with firearms