I bought a 1187 Rem. Sportsman 20Ga with the short Rem. choke barrel. Trouble is I cannot get a Rem Choke to go into hole to screw it in. There is what I believe is a Mod choke tube in it and it is marked like this. M(0.5)Lead. This tube is very thin compared to Rem chokes. Does anyone know who made these tubes and if other chokes are available? Thanks in advance.
