Hey fraze , Welcome Aboard, I don't know if your aware of it but you can buy a 24 inch fully rifled barrel with cantaliver mount for your 870 for only $160.00 . Ithaca and Mossberg both make them for the Rem. 870 . And may i add a heck of a lot cheaper . I have the Ithica barrel on my 870 and its very accurate...It suits me . Good Luck