The Model HP18 is a semi-auto 4+1 capacity home-defense shotgun. Available in 12 and 20 gauge, the shotgun can handle both 2¾ and 3-inch shells. The 19.5-inch barrel features a muzzle brake. Riding atop the receiver is a Picatinny rail with an adjustable Ghost Ring rear sight and a fiber-optic front sight. The black-finished two-piece synthetic stock provides a full pistol grip on the buttstock portion, a checkered forend, and sling swivels front and rear. The overall length is a compact 40.5 inches.