nice mechanical modeling work.
I looked at it hard and the only edge that struck me as being unnaturally hard was the end of the barrel. If there's going to be bevels on machined steel edges it's got to be so miniscule it's hardly perceptable.
also looking forward to texturing and perhaps seeing it in action...
Check out the subsurfacescattering on my tongue...
<a href="https://www.reitzmachine.com">www.reitzmachine.com</a>