So today one of my regular clients - a bad ass cowgirl - turned me onto a Remington 12ga shotgun barrel. Turns out her neighbor was cleaning his new shotgun when it went off and blew a hole through the roof. Heh heh. No one was hurt but his wife proceeded to take his shotgun apart and distribute the parts around the neighborhood. Anyway, question is how can I tell if this will fit my Remington 870 express? Besides dismantling it. It's stamped Remington 12ga 2 3/4 - 3 in magnum.