I recently bought two 590s (not A1s) at a really good price from Bud's. They were models built exclusively for a particular distributor (I think) and featured a Marinecote receiver and matte blued everything else. The two tone finish is attractive but makes little sense as it seems to me that the steel parts should be Marinecoted as opposed to the corrosion resistant aluminum receiver and that may be why they were so cheap. Anywho, what I've noticed is that these two Marinecoted models have SIGNIFICANTLY stiffer actions than ANY other Mossbergs I own. I suspect that may be from the slightly added dimension of the Marinecote. Have any of you other gents noticed this peculiarity in your Marinecoted 500s/590s? Knowing what I know now I don't think I'd ever buy another Marinecoted Mossberg shotgun. I've dry cycled these things hundreds of times with no noticeable loosening of the action.