The more i see them, the more i like the Bapty's Blaster! And yours is incredible
The only thing i see as a flaw (i'm not sure!) would be this:
On the Original, the curve makes an angle whereas on yours it's all curved. And IMO it's more likely because of the folding stock body which is fitted inside this unfoldable part of the stock:
Edit: And why did you add the white lettering on the scope? I mean, you've let the resin pouring spouts on top of the scope, so as i understand it it's implying this isn't a real scope and they surely didn't take the time to paint the lettering in white