[quote=Monochromatic Rainbow]
That, or they spend all the time they can afford at the gun range like me :P Or maybe tinkering with something, y'know, keep things open.
[/quote]

Or in Riley's case to take a bunch of metal and weird them together on the suit to create a set of powerarmor, fallout style. 

Calling herself a member of The Brotherhood of Steel is also optional.