I'm not sure when you put this guard in, because from what I remember all the guards used to have Pipe Rifles (that's a another joke, right?) and Sniper Rifles.
Now, when anyone starts combat in NCR, half of the time that guard who is right at the Bazaar entrance, bursts his 10mm SMG, injuring the innocent.
If you could just remove/replace this guard or and any other guard with bursting weapons that would be great, thanks.