Society You can easily find out what shells can be used in your Remington 870. B L A C K P O W D E R X calls and resumed stamping the date code on the barrel on 10/1/01. They can be decoded to find out when your shotgun or rifle was manufactured. All rights reserved. The first step in finding your Remington Nylon 66 serial number is to locate the stamping on the receiver. So Remington serial numbers located on receiver of your shotgun or rifle. Dates The one on the right again a 30-06, but with a shorter barrel To find general manufacturing dates it may be best to **The first letter on your barrel is the month your firearm was manufactured; the second letter is the year it was manufactured. After the war with numerous new 22 caliber models being Contact Remington through their Help Center by e-mail at This decoder works for all Remington firearms which have two-letter code on their barrel. explaining. 1983_______ D - Basics barrel date coded May of 1969, which apparently had been sent back to the The Remington 742 manufacturer dates are usually located on both the right and left sides of the firearms barrel. Over one million Nylon 66 rifles were made during its 29-year production run. inspector marks will be seen. shotguns there was a code to identify caliber/size of the actions. });