its not an enfield they have a 10 shot removable mag.....
the magazine for ben's rifle is inside the stock or it is a single shot
I'll do some checking it looks like a japanese rifle from the early 1900's try this site and see if any of the characters on your gun match the arsenal marks use some metal polish and clean all the rust off so you can see better
http://www.radix.net/~bbrown/japanese_markings.html