When you wear an article of clothing that is way to small for you and the pressure causes a button on your clothes to come off and shoot out like a bullet
Marcus was wearing a suit jacket that was about 8 sizes too small for him and he had a button bullet almost take my head off.
by Itsyaboy99 September 8, 2014
A pain in the crack tool that is mandatory on all AR 15 rifles sold in California that requires the magazine release button to be pushed by the tip of a bullet in order to get the magazine out. It's sole purpose is to hinder the shooter from changing magazines by the use of a standard mag release button; thus making the rifle CA legal.
So I got my new AR 15 and it sucks that i spend more time trying to take the mag out than shooting, this bullet button really sucks!
by Nasor6221 July 2, 2015