Co-op, no weapons (Resident Evil 6)

Good day to all! I started with a friend to go through RE 6 on the network, I play through Steam.
In the game, he starts the game as Chris and I as Pierce's partner, after starting the game he has all the weapons that he picked up, but I only have a PP and a sniper. how to fix it? maybe there is some kind of cheat to get weapons on v1.1.0?