I need help finding a certain weapon.

Hope this helps: link

I can help! Keep in mind that あなた need to make alot of progress in the game before あなた acess to them! They only 表示する up after あなた use them in a mission! I forget wich one! Anyway the easiest one's to find is in Mad dogg mansion によって the キッチン on the first floor! Thier under the stairs that leads to the large hallway with several rooms!