Just killed everyone at GunRunners. Did I mess anything up by doing so?

Nope, you can still buy from the robot in the kiosk. The only thing is that the crimson caravan won't be able to sell you stuff at a discount but to tell you the truth I never saw any difference in sales. Also, Alice claims people will be sent out to look for you but they never appear.

Good to know. I was thinkin' of takin them out, but didn't want to lose the business. Weird how that robot can run everything on his own.

I always feel guilty killing those guys. They run a legitimate business, and Alice McLafferty is a worm that deserves a shallow grave and somebody stealing everything she owns while the rest is burnt to the ground.