Remington introduced its pump-action Model 870 in 1950, and with more than 11 million made, it is hands-down the most popular shotgun of all time. The Model 870 DM does something other 870s don’t; it feeds from a detachable box magazine. Gone is the underbarrel tubular magazine (it still supports the fore-end, though), a new assembly added to the underside’s loading port allows the gun to accept either three- or six-round polymer detachable magazines (thus, the “DM”). The gun comes with an 18 1/2" cylinder-bore barrel topped with a brass bead. You can get it in basic black, with a Magpul stock and fore-end, in camouflage with thumbhole stock, in TAC-14 guise with a Shockwave bird’s head grip and Magpul fore-end, or, my favorite, with an old-school hardwood stock and corncob fore-end. remington.com
