For years, I refused to own a pistol that required pulling the trigger as part of the process of disassembly because I viewed it as an ND waiting to happen. Eventually I relented and now own a couple where pulling the trigger is a necessary step to take the slide off. And just like I was...
Having worked there, I would advise avoiding Mainstreet like the plague. Also, there crappy range is only 50 feet. Not worth the time, money, or safety risk to attempt to even shoot there. Completely useless range for sighting in anything other than a pistol at very close range.
I'll be nice about it the first time, it happens again, not so much. When I worked at a gun store, I went home with quite a few "free" bullets from customers' "unloaded" guns.