Maria is a unique weapon in Fallout: New Vegas and the graphic novel All Roads.
Maria is a unique variant of the 9mm pistol, that has a higher rate of fire, more damage per shot, is more accurate, and has higher durability than the standard variant. Like most unique weapons, weapon modifications cannot be used on Maria. However, like the standard 9mm pistol, Maria is also a concealable holdout weapon so long as your Sneak skill is 50 or greater.
Even in ruins and covered with scaffolding, what I’ve seen of Nchuand-Zel so far is more incredible than anything I could have ever dreamed of. If I thought Markarth was a step into the past, going underneath Understone Keep is like — like going back into another world.
— The journal of Jociel Naenor (7 Frostfall, 4E 201)
Blowing Shit Up Just Cuz.