The previous failures had to do, in my opinion, with mismanaged and non existent retail operations.
Like movie theaters make money on concessions, ranges sell ammo, guns, supplies. K2 did ok, they just didn't know what their customer base wanted really, and didn't give them selves over run room on the facility.
GMFSC didn't have anything. range fees alone just cant support a business.

If they figure out what people want to buy, and have a good little guns hop upstairs, they can make it work. but it wont without.