There is no place more dangerous for a criminal than a gun store, almost everybody is armed.
At our local gun store all the clerks are armed, mostly with Glocks and Kahrs. Any idiot who would mess with them would be quickly wind up in the hospital or the morgue.
A Liquor Store in Texas and many other States. I was armed every day I worked, that was every day we were OPEN Mon-Sat, 10:00 - 21:00. A 1911 7+1 and 6 spare 7 Round Mags, 50 is a nice round number. For second backup I had available a Ruger P85 MK-II 9mm 17+1 ready and 2-35 Round spare Mags ready to rumble should the need arise.
One of the Owners ask if I wanted a Shotgun. I told him I didn't see the need for that plus I didn't want to chance damaging the Inventory with a Scatter Gun. Besides I asked just where did They think I was going to Carry it ? They kept one in the back Office anyway.
The store was right on one of the only roads leading to that side of the Lake. Nice area but with the Highway right there... Ya never know when that one scumbag might be driving by and snap.