They however continued to mark the date code on the end flap of the shipping box for shotgun barrels however.They planned on using just the serial numbers to tell when the gun was manufactured.Several variations of the Model 1100, in 12, 20, and 28 gauges, and .410 bore are still in production as of 2016. A 50th Anniversary highly decorated version was introduced in 2013.
The Remington 1100 is a gas-operated semi-automatic shotgun, popular among sportsmen.
The Remington 1100 was the first semiautomatic shotgun to feature significant improvements in felt recoil, weight and reliability.
Information confirming the manufacturing coding used by Remington can be found online.
Decoder is based on following information: Remington Year of Manufacture Codes maybe found on the barrel of your Remington rifle [or shotgun] on the left side, just forward of the receiver; the first letter of the Code is the month of manufacture, followed by one or two letters which are the year of manufacture.
This was exactly the same gun as the 1100 in 12 Gauge, but with less costly birch stocks, and less rollmarking on the gun's receiver.