The Marine Magnum has been around a while. Basically the same internals as any other 870 (yes, i know the LE guns have some upgraded springs and the Wingmasters are polished out to a higher level...I have them all). The Marine is definitely lower-maintenance than any blued or parked gun where it's wet, and especially where it's wet
and salty.
http://www.remington.com/products/fi...ne-magnum.aspx