Hawthorne
The abandoned Hawthorne military base is located east of New Reno. Get here by completing the mission for Big Louis, or simply find it on the map.
Turrets are installed on the base, which will make you a pretty high quality colander (at low levels). Some of the turrets can be turned off via the power supply panel (on the southern wall of the building with turrets), the rest can be turned off only by de-energizing the entire base (the generator is located in the bunker).
In versions 0.99a and 0.99b, you can find an armored suit that the sheriff of Salt Lake will buy for $10,000