This Mossberg manufactured bolt sub - assembly is for the model 195K-A bolt action shotgun in 12 gauge and is in very good condition exhibiting a brownish gray patina with some original blue finish, surface rust and light wear. This part lacks the bolt head assembly with extractors. (file photo)

NOTE: Mossberg model 195K-A shotguns with the following year/serial number have been observed with this part: NSN