500.00
You need to contact Remington for an answer.
$350
Try a 1300 barrel
Remington 870 Express Super Magnum.
26"
The difference is that the Remington 1100 3 inch mag will take three inch mangnum loads and shorter where one that doesn't say 3 inch on the barrel will only take two and three quarter inch shotshells or smaller.Trying to put a three inch inch a gun that is not designed to will cause extreme stress on the barrel and will get jamed in a pump or automatic shotgun.
1300
100-400 USD
100-400 USD depending on condition.
$139.95
The average price of a Remington 870 Express Magnum pump 12 gauge shotgun "brand new" is about 300-450 dollars. I got mine used for $250
The sizes of shells it accepts will be stamped on the barrel