Steve, interesting to read the calculations, 89 hours of "making chips" to go from 14 kilos to 1. In getting estimates for my prototype, which in some parts is more intricate than a Mauser action, the estimate of CNC machine time was one 8 hour shift to go from a cylindrical billet to the finished product.

As new technology becomes more widely available more processes are brought inhouse, a look at Boxall and Edminston's site shows just how much of the "heavy lifting" is now centralised in one shop.

Ironic that new technology will make the question "who made it" obsolete!

Gunmaking is a fascinating business.