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 cheekpiece for use with raised optics, low cheekpiece 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 for 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.