Fallout – In Mothership Zeta, what and where are the different armor types you can acquire

Everything in Fallout is a trade off. I believe the best armor I got though was the winterized armor found in the Alaska simulation.

The easiest way to do this is to engage in a trick known as Reverse Pickpocketing. In short, what you need to do is plant a higher quality suit of armor on the individual wearing the gear you want (measured by defense rating). They'll then equip this armor, leaving you free to pickpocket the gear they're wearing. The Metal Armor and Helmet are a good choice for this, because of their high DR value, and relative low cost. Other options include any other Combat Armor variant other than the Security Uniform, or of course, any Power Armor.

An alternative is to make use of The Mesmetron to stun/hypnotize a guard and demand they hand over their stuff. This may end violently however.