I managed to find 4 firearms when I went into the city. I found 2 Scar CQB's (only 1 had ammo, 30 rounds), 1 9mm jericho (no rounds) and 1 mossberg shotgun (8 rounds). I took out 1 bandit that tried to rob me then I got hit by a sniper
A word of advice, trust no one! They will claim to be friendly then club you in the back of the head, rob them before they rob you.