Free Fire (2016) is a black comedy crime thriller where a shady arms deal in a Boston warehouse erupts into chaos after a single gunshot. What follows is an absurdist, bullet-ridden standoff as criminals, mercenaries, and double-crossers turn on each other in a violent, darkly funny shootout.

Från IMDB:
Set in Boston in 1978, a meeting in a deserted warehouse between two gangs turns into a shoot-out and a game of survival.