Back in the old days,the Arabs would steal British railroad rails and make them into copies of British rifles and pistols. They did this sitting on dirt floors in caves by hand. I would like to have been there to see how they managed to do that!! And,railroad rails are not the easiest steel to work with.
Of course,in Williamsburg they make flintlocks completely by hand. But those are not as complex as modern fire arms. And,a Webley break top pistol is by no means the simplest pistol to make. It was the only pistol they usually could get their hands on to copy.