gauss rifle

[Mikirie]

there is also a gauss rifle on sheriff and deputy of NCR,but i wouldn't engage that fight!!!!!

[Blumpkin]

don't have to fight, just super stims, rest 10 and plant plastique

[GawainBS]

Also, remember that the northern most merchent in SF has two tables. Just check both of them each time. Same goes for the dwarf in NCR.

[Köldkonung]

Inject 10-15 superstims into the sheriff in NCR and you'll have it. Or secretly plant some armed explosives on him, leave the area and then come back.

Are you SURE you checked the right shop in San Fran? The right one is a little tricky to find.