You're probably not going to believe this, but I have a friend who had a gun like the poster is describing many years ago....Guess what was on the barrel??
Yep, the word "Mouser". Gad!! Wonder if it's the same gun?? What's the chances....???? You couldn't hit the side of a barn from the inside with it, either. If I remember right it was chambered in 30/06.....