Date of Manufacture for Remington 1100 Serial # N566363V thanks. Joined Jan 29, 1998 25,277 Posts #2. Jan 25, 2012. Unfortunately the serial number tells you. Will not fit 20 gauge standard 870 shotguns with serial numbers ending in a 'X' or 'N' 1100 Steel Shot Barrels includes a Full choke and is designed for use with 2-3/4' or 3' Magnum steel or lead loads when used on Magnum receivers and 2-3/4' or 3' Magnum steel or 2-3/4' lead shotshells when used on non-magnum receivers.

“light weight” (“lw”) (also includes m/1100 “lt”) u 20 ga. Lw magnum (also includes m/1100 “lt”) j 28 ga. H.410 bore (2 ½” or 3”) model 1100 letter prefix 1964 to approx. 1968: no serial number prefix 1968 to present: letters used (in sequence) l-68, m-74, n-78. The.204 must be a fairly new gun so you have it easy. Some of the older stuff can be confusing. If you email Remington they will give you the exact info (usually). I have done this on all mine. The exact place on Remington.com can be hard to find, but keep at it, and write down the navigation when you find it.

Remington 1100 Serial Number Dates