Picking up a FNX pistol, in worn state and empty of ammunition. Added a pristine magazine filled with pristine ammo, and a pristine suppressor. Gun appears functional for me (firing rounds when fired) but bullets appear to have no effect, not harming or in any way affecting zombies. Other players in my group remark that the gun appears jammed or empty (they can see the slide stuck back). I am unable to interact with the gun in a way that corrects this apparently desynchronised state. Gun is rendered harmless. This is a dangerous bug because the gun appeared fully functional for me, even firing bullets and creating impact effects in the environment, but causing no damage.
The FNX was picked up at Balota military base.