Oly, I'd look at the construction of the barrel on your older 870 and the newer barrels. I doubt that there is much, if any, difference at all. Contact Remington (you can email them from their website) and confirm if you can/can't swap the barrels. I've emailed them before and had a courteous, prompt response on a different 870 question. I'd also look at the nicer Wingmaster barrels to match the bluing on your gun and enhance the aesthetics. There are some aftermarket blued barrels (Rem and others) that you might want to look into.