The innovative PowerPak System brings a new level of versatility and performance to the SpecOps Stock. This four-piece modular system is designed for rigid and stable use in the toughest of environments. Features include; high cheek piece for use with raised optics, low cheek piece for use with low-rise sights, shell holder with five 12-gauge shells allows for rapid reloads, ambidextrous design, watertight storage compartment for spare CR123A batteries or similar-sized items and can be assembled by left or right handed shooters by snapping it onto rear portion of stock. Designed specifically for use with all versions of the SpecOps Stock, SpecOps Stock Gen II, and the SpecOps NRS.