I have looked the gun over and, as of right now, I been unable to find a serial number. One needs to be sure that the barrel is original to the gun before trusting the Barrel Code listing, above. Made 1968-1986.') 0 may be for 1990 & G for July.-ACR2K00# 1993 Redline R元40 (Serial number stamped on BB) ACR3A00# 1993 Redline R元40 (Serial number stamped on BB) To find your serial number, you will need to refer to your owner's manual. Model 183K-D Bolt Action Repeater, change to barrel and front sight. Model 183K-C Bolt Action Repeater, change to trigger and safety lever. Model 183K-B Bolt Action Repeater, Slimmer barrel. Model 183K-A Bolt Action Repeater, firing pin design change. Genuine walnut one piece Monte Carlo stock, later models walnut finish. Weight 5 1/2 lbs, barrel, 25' with variable C-Lect-Choke. The 183K is similar to the 183D, but had a 'C-Lect-Choke', which allowed the shooter to vary the choke between four settings without changing adaptors (as with the 183D). Model 183D-G Bolt Action Repeater, change to barrel and front sight. Model 183D-F Bolt Action Repeater, change to trigger and safety lever. Model 183D-E Bolt Action Repeater, Slimmer barrel. Model 183D-D Bolt Action Repeater, change to ejector interrupter.

Model 183D-C Bolt Action Repeater, ejector interrupter added. Model 183D-B Bolt Action Repeater, firing pin design change. Model 183D-A Bolt Action Repeater, left hand extractor added. The shotgun was shipped with a wrench for removing the choke tubes. The gun was distributed with two choke tubes (modified and full), which mount by screwing to the outside of the barrel, as opposed to the inside, like the Remington 870 or other modern shotguns. It had a plain one-piece pistol grip stock. The original model produced from 1947-1948.

Mossberg serial numbers mfg date