That outfit needs follow the same guidelines as tattoo parlors: Don't follow directions from a customer who is under the influence of alcohol or drugs.
Seriously, I find it very difficult to believe that a customer actually ordered it (or any other gun in the link) like that. I'd certainly give it an A+ for creativity and workmanship, but an F for the appearance. I can't really see these abominations as anything else than showpieces to demonstrate that "we can do anything".
Interesting for sure, but rather painful to look at.