The SLP and SLP Mark I represent the ultimate in shotgun performance for 3-Gun action shooting competition or personal defense. No other shotgun has more 3-Gun Tactical Division wins than the FN SLP. All SLP models offer 3" chambers and extended magazine tubes. The SLP model features an 18" barrel, a MIL-STD 1913 top rail with adjustable ghost ring rear sight and a high-profile protected front sight. The SLP Mark I offers a 22" barrel with cantilever scope base, adjustable rear sight and a fiber-optic front sight. The SLP Mark I is also available in a rifled barrel model for optimal accuracy with slugs.