What are Latex Foam Weapons used for? These weapons are used primarily in Live Action Role Playing events (also known as LARP, or LRP.) It refers to a type of interactive gaming in which the players assume game identities and act as a specific character for the duration of the game. These stunt weapons are created from soft foam and covered in latex and other materials to give them a realistic look but are safe to use. These are designed for 'light touch' games, not full contact.