The body has very little to carry out with it. It's the lockwork and tolerances. The FA will not be created to very great tolerances just for giggles. It is really carried out so which the guns survive at 65,000psi without shaking them selves to parts. I took him at https://bookmarksparkle.com/story17180001/top-waffengesch%C3%A4ft-m%C3%BCnchen-secrets