Metal armor serves as one of the two early-to-mid-game armors in Fallout and Fallout 2, along with leather armor. Metal armor has a higher amount of resistance and threshold bonuses but leather has a higher AC. Overall, the metal armor is better than the leather armor. Metal armor is also very heavy for the relatively low amount of protection it provides. Notably, metal armor (and metal armor Mk II) has a very high laser resistance, which is only surpassed by T-51b power armor, advanced power armor and its second mark, including Tesla armor.
On the main level (automap - Mine Level 2) of Great wanamingo mine in Redding. It is in the northwest part with the elevator, at the end of a rubbled tunnel (automap - tunnel to the right from tunnel with elevator), well hidden under damaged wooden crate and rocks.