I am not a shotgun guy at all so need a little direction. I have an 870 12 gauge Magnum that's kind of a mutt but has some newer, upgraded parts. It was made sometime after 2011 or so, and it doesn't say Express on it, but does have the P suffix in the serial number denoting it's a magnum and can handle 3" shells. It has a brand new Remington 870 Fieldmaster barrel (with all chokes) on it that has 0 shots through it and a brand new Fieldmaster trigger group. The detent in the mag tube has already been removed to allow for an extended mag tube. The stock and fore end are standard synthetic black, Express furniture and in good condition. Trying to figure out what I should list this thing for?
