There is definitely an area on top of the receiver where it looks like it was ground off, and reblued. As I said, there's very little markings what-so-ever. I thought it looked too small to be what my friend thought (.30 cal), .260 sounds right.
After looking around, it's definately a type 99, 7.7x58 jap. Thanks for the help!
I don't always rock out with my glock out, but when I do, it's all the way.