I have a Remington m11/sportsman made in 1939 according to Remington historians. It has a magazine limiter/plug to allow only 2 cartridges and I want to maximize the magazine capacity and eliminate the plug. This gun has all the US military ordnance markings and is in riot gun configuration with an 18" or so barrel. There is no threaded cap on the magazine but there is a T bolt that treads into the end cap on the magazine tube. I can't determine if the end cap is threaded into the magazine tube, welded or friction fit. So if anyone has insight into this issue I sure would appreciate an assist.