1. your physical self in reference to getting laid or having mad game. your genitals, clothes, appearance etc. If someone is attractive, sexy, or has huge breasts or cock.
2. the many devices from which to smoke weed. used when a person has several pieces to choose from.
dude 1: yo brah! suzy has got a fine ass!
dude 2: Brah! she's got a mad arsenal.
dazed: hey, i left my pipe at home! what are we gonna smoke with?
confused: don't fret brah! we'll use something from my arsenal.