I Spill Your Guts (2012) on Netflix

Two friends Dennis and Joe join the military together. While on a routine mission, the two are quickly surrounded by enemy fire. When Joe stands up in the line of fire to run, Dennis pushes him out of the way and takes a bullet in the throat. Dennis wakes up in hospital to find Joe rewarded as a hero. Joe told a lie and took all the glory, and Dennis was left as a mute from the accident. Dennis can't talk, but actions speak louder then words. The two return home to N.Y. and now the war rages in the streets. Dennis wants revenge on Joe, so he will kill everyone close to him. One little lie will cost so many innocent lives.