Megaton armory

Behind a very hard locked door is Megaton Armory, home to a computer terminal which can be used to turn off a Mr. Gutsy Robot and also to the weapons listed below (which to take is to steal).

The Key
The sheriff Lucas Simms has a key to the armory which can be obtained early in the game by telling Simms that Mr. Burke wants you to blow up Megaton after agreeing to blow up the town for Burke. Simms will attempt to arrest Burke, but Mr. Burke will turn on Simms and kill him if you do not intervene. You gain the key to the armory off of Simms' corpse. Alternatively the PC can kill Simms but the town will then go hostile?

Citizens Shocked
If the PC is seen entering the Megaton Armory, or if Deputy Steel leaves the armory while attacking you, the whole town will become hostile and either flee or attack. Leaving town and waiting a day will calm down Megaton's citizens, and the intrusion will be forgotten.

Loot

 * hunting rifles
 * assault rifles
 * pistols and ammunition