I recently bought a suppressor and am waiting on the ATF. My can is a rimfire model rated up to a .22 mag. I have several handguns and rifles that are already threaded, but some that are not. I have a couple of CZs in HMR and .22 mag that I would like to have threaded. I am in metro Atlanta and had one gunsmith quote $175 per barrel. That includes a thread cap and shortening the barrel a couple inches. Is that the going rate?