Yes, Rural King does sell guns and ammunition on Sunday.
Their store hours are:
| Saturday | 7AM–9PM |
| Sunday | 7AM–9PM |
| Monday | 7AM–9PM |
| Tuesday | 7AM–9PM |
| Wednesday | 7AM–9PM |
| Thursday | 7AM–9PM |
| Friday | 7AM–9PM |
There are over 120 Rural King stores in 13 states all with same store hours.