In Virginia liquor stores are state run. They are very good places and rarely the scene of any crime in my area. This was an exception.
You are at the cash register paying for your liquor when three young \"gentlemen\" come in wearing big jackets and neck gators up on their faces (yes it is cold outside) and walk to the back of the store. The store is a rectangle. Three aisles running front to back about 30-35 feet to the back. The store is about 20-25 feet wide. At the register you are slightly offset from the center aisle, the clerk is straight on to the center aisle. You and the clerk are the only ones there, other than the three gentlemen, as it is about 10 minutes to closing.
At the back of the store each of the gentlemen take an aisle and begin heading back to the front. Your CCW pistol is a Sig P229/40, it is in a fanny pack in front. Your hand is on it and it is oriented in the direction of the gentleman in the center aisle. None of the gentlemen have presented a weapon of any kind yet. However, your powers of observation indicate that these gentlemen are not shopping for liquor.
You can chose to ignore the details about what you are carrying and how if you would prefer to think about your own method and pistol. This is obviously from an actual event, which is why I know the details. No worries about the clerk not being the clerk or the \"gentlemen\" being police or anything other than some thugs looking to rob a liquor store at closing time.
I know how it was dealt with, but I see several ways it could be dealt with.
What next?