Aimtech rail mount warhammer moss 500/590 12ga. FEATURES:-Aimtech Warhammer Rail Mount-Mossberg 500/590 & Maverick 88-12 gauge -Black-24" of Picatinny-style top rail and two 5 inch side rails-Constructed of CNC machined aluminum and hard coated for durability-Attaches at the receiver pin slots and with a front barrel mount for a totally secure fit-Includes all mounting hardware -Made in the U.S.A.