Well a co-worker ask me a few days back if I new why his safety selector was jammed he was unable to get it to move. Well unfortunately I have not owned one would like to when I can afford it so I do not know the internal guts of a AR I told him. Can anyone out there tell me why it maybe doing that ? I figure he has reinstalled something wrong, just my thought though plus I think if you own a gun you should know how it works. (I did not tell him that again just my thoughts. Can't anyone tell me so I can relay it to him ? Thanks guys. Oh by the way it is really a co-worker it's not me.