I’m no gun nut, but I used to own a 9mm, and when I’d try to go to gun shops for ammo and targets, a few were closed on Mondays. Why? I can only assume that it’s a slow business day and they do more sales on the weekend. Anybody have a better answer?
Motorcycle stores used to be closed on Sundays and Mondays as well. Open Saturday. Sunday was for riding.
Most of America’s greatest cultural institutions are closed on Mondays: art museums, concert halls, and, by extension, gun shops.
If your business is related to recreation, it makes sense to close on Monday. People have to go to work.
Also many beauty salons/barber shops and chef owned restaurants are closed on Mondays.
My guess is that small independant businesses that are often open Saturdays, and sometimes Sundays, need a day to take care of their affairs. They need to do payroll, order supplies and go to the bank. Monday seems to offer a lull that affords them the chance to do those things.
I can think of 3 gun stores in our area that are closed on monday. All 3 of them have indoor ranges and host pistol leagues and/or training on mondays. Not sure if that’s why the ones you went to were closed though.
Grumpy workers back to work on the dreaded Monday morning??? What could be wose than that?
Giving them guns of course.
Gun Store owners very often travel to gun shows over the weekend. It’s a lot of work hauling thier stuff around, doing the billing and travel often involves 5 or 6 hours of driving both ways. Even the ones that don’t travel do a very large percentage of there sales on Saturday. It just makes sense to have Monday as thier day off.
You forgot the smiley.
When I lived in Lancaster (CA), it seemed that most small businesses were closed on Mondays. Lancaster seemed to me to be a ‘company town’. You either worked weekdays for one of the aerospace companies in Palmdale, worked weekdays for an aerospace company at Edwards AFB, were in the Air Force, or grew alfalfa. With so many people who worked ‘nine-to-five’ weekday jobs, it made sense for small businesses to close on Mondays so that the businesses could make money over the weekend and have a day off when it was slack.
I hope not, I’m expecting a delivery tomorrow. 
But it can wait if they’re closed.
Depends on the store of course, mondays are a traditionally slow day for retail, as mentioned above. The owner needs a day off!
Of course it doesn’t help me if I need to buy shells for the Tuesday eve sporting clays.
In my area, the traditional day for barber shops to be closed was Tuesday or Wednesday.