In that case he was definitely trying to unload the gun the correct way so it was an accidental discharge. With the golden rule of “don’t be a dick” always in play, it’s up to you to decide to DQ the guy or not. If it was me? Being a local lvl1 match I would have prolly let it slide. That is if they guy had been good squad mate all day. He would still receive a stern warning along with some help to prevent such actions in the future