What if Wal Mart stops carrying guns?
I don't buy guns there and only rarely ammo.
I don't think of buying guns at department stores normally, like K-Mart and Sears, though they used to carry firearms.
I've always preferred to support the little local gun shop over the gigantic national chain where I could. Where I can't, I trend towards the internet places like Brownells and Midway.
Be honest, has Wal Mart carried a gun you wanted to buy recently or has their rack been mostly populated with the bottomest of bottom end guns? Did you notice that where it's not the entry level cheapo there's no price saving over the local shop too?
I hope they stand up to the government, but I don't expect their exiting the market to affect things much.
The local gun shop will be more than happy to pick up the slack and they generally offer better customer service as well.