Excellent ergonomics and the superior strength of rugged advanced military-grade polymer shape the Troy Battle Ax Pistol Grip. Refined angling sets the hand close to the receiver and leads the shooter's arm and shoulder into a high-comfort, high contour zone. The sturdy flip-top base allows for storage inside the grip cavity. The shortened length ensures a perfect grip every time while aggressive scale pattern keeps the shooter s hand in place. Fits M4, M16/AR15 and FN SCAR rifles.