Welcome!

Could be Bannerman, or just shortened by some hunter.

The barrel band is on backwards - it will fit better (it's tapered) if you turn it around.

A question, please, and I do not mean to be impolite, but, if you know you paid too much, and you knew it wasn't right, why did you buy it? Real carbines are not rare, and are so much easier to move if you ever want to dispose of it, upgrade, etc. Sorry, but I have just never understood such deals.