A quick note about EDM wire cutting, one of the modern processes used by some gunmakers. I used it yesterday to cut lock pieces for a new design.
The delivered parts are cut super precisely, with edges absolutely square, and even the sear bents are cut to the proper angle. I rate it better than laser cutting. The machine "reads" the CAD design and cuts acordingly.
Having only the final polishing and fitting to do, the work goes along at a fair clip. For the life of me I cannot see how cutting the bits with a hacksaw and filing them down to the dimension returned by the EDM machine is in any way superior.
The service is costly, but saved a week's work. Had the work been larger scale there would be economic benefits in adddition to higher quality.
