Entrepreneurship at its best. If the service business goes down he can open a range in part of the garage.
Probably only a matter of time before Gummint Motors shuts him down...........nah, probably easier to just sell to the Chinese. 
This might very well be a way for him to transition to the gun business all together. With the way Obama is playing politics with the auto industry, Hummer dealerships are an endangered species.
What this guy is doing, consciously our not, is setting himself up for when his car business goes belly up. Instead of having to start over from scratch he will simply be able to change the sign out front and PRESTO he will be the biggest gun shop in town. He wont have to miss a beat.... there will be no need to restaff, he will never have to close down shop to change things over, and he will already have a customer base for the new business. It looks to me like the guy is going into survival mode, and I hope it works out for him.