A Mossberg 590 Mariner 12 gauge pump-action shotgun. This modern firearm features a brushed nickel-plated (Marinecote) barrel and receiver, complemented by a black polymer stock and a ribbed polymer forend. Manufacturer markings include “MOSSBERG®”, “MODEL 590”, “12 GA.”, “CHAMBERED FOR 2¾ AND 3 IN. SHELLS”, and “CYLINDER BORE”. Additional text specifies “MADE IN U.S.A. NORTH HAVEN, CONN.” and includes a warning “BEFORE USE, READ OWNER’S MANUAL, SAFE OPERATION” along with an address mentioning “EAGLE PASS TX. USA”. The serial number “R555482” is present on the receiver. The buttplate retains a yellow “S/N CONTROL” sticker.