The IMI Defense M4 Operator Tactical Stock features superior cheek weld Sopmod design, rigid and robust design, rubberized and adjustable butt pad and watertight O-ring sealed battery compartment. The butt pad slides down in multiple positions allows the user to raise the cheek rest to a desirable position without reducing the rigid design. Available for Mil-Spec and Commercial buffer tubes. With two QD mounts for extra support, available for left and right shooters.