To deliver the full accuracy potential of modern, high tech deer slugs, the Mossberg M500 Slugster deer guns all have fully rifled, ported barrels with a variety of sight options that include integral scope mount bases, light gathering fiber optic sights, and adjustable rifle sights. The dual comb combos add the advantage of quickly and easily changing stock dimensions between high comb for scope sighting and low comb for wingshooting.