i pick up the PAX gun in the plane, but it only gives me one shot, and once i use it it doesnt reload or anything , down in the corner where it shows the ammo counter , it shows just a 1, then a 0, but once i take that only shot then both numbers just say 0, i watched a youtube video so i know it should say 1 - 1 in the corner and just reload automatically and the weapon is suppose to have unlimited ammo. any help would be awesome cuz im so close to beating the game but this is a gamebreaking glitch and i cannot progress without it

thx