He needs people with a good work ethic (a full day's work without spending half the time looking at their phone). This will be a challenge. Most people will assume they will spend most of their time playing with guns and going to Shot Show in Vegas.
I think a lot of people like the idea of working in 'the industry' but not the real work part of it. I suggest checking with Chattahoochee Tech and maybe the Paulding County School System (the trade programs). They may have potential candidates.