Picked this up and wondering if anyone has a collection or has any thoughts on the Hamilton #27. Here's a few photos.

What barrel length? I had one years ago that was made with a 15" barrel. FEDs said I had to turn it in. I had 1" added to the end and the FEDs could stick it. Brass lined barrel. Not to accurate. Got mine for $50 at a auction. Only bid it got. Don't know who owns it now. Made by c.j. Hamilton in Plymouth Mi. Boys rifles. 3 models, a bolt a pump and the single shot