A custom gunsmith will buy a barrel blank and then outside contour it ... In addition to a chamber reamer and a wrench to turn it, you will need a set of Go and No-Go gauges to check headspace.

and barrel stock from 0.4 - 4.0 in. OD. Next in the process is a two-spindle pull-reaming machine that features automation for insertion and repositioning of reamers. Reduced set-up times and rapid ...