From Wikipedia:
Tactical Force is 2011 action feature film written and directed by Adamo Paolo Cultraro and starring Stone Cold Steve Austin, Michael Jai White, Candace Elaine, Keith Jardine, Michael Shanks, Michael Eklund, Darren Shahlavi, and Lexa Doig.
A training exercise for the LAPD SWAT Team goes terribly wrong when they find themselves pitted against two rival gangs while trapped in an abandoned hangar, armed with nothing but blanks.
Rated as certificate 15 and not to be supplied to persons below that age.