They resumed stamping the date code on the barrel on 10/1/01. Call Remington with the serial number and they can tell you. They continued to mark the date code on the end flap of the shipping box. 1708411 - 11/02/10 08:21 PM How can I tell is my Remington 600s trigger was replaced. On 8/9/99, stopped stamping the barrels with the date code. One needs to be sure that the barrel is original to the gun before trusting the Barrel Code listing, above. Using these barrel codes to date a shotgun is somewhat unreliable, as shotgun barrels are often interchanged at random. Using barrel codes (such as those listed above) to date the manufacture are reliable on Remington rifles, as the company rarely changed barrels on a customer’s rifle. Caliber/Gauge.222 Remington.223 Remington 6mm Remington 6.5mm Remington.308 Win. Designer/Inventor: Research & Development. Serial Numbers by date (factory record book) Description: Bolt Action, compact rifle with ventilated rib. Months of the year, for example B=January, L= February
Near the frame that identifies the year and month of Have a code located on the left side of the barrel