The Grunts (2012)

Paul, a former Marine has opened his home to a group of disgruntled runaway boys. Paul has raised them from boys to men, while teaching them the dangerous art of skilled killing. Some of them decided they wanted to go a different route, which means taking Paul out. Cameron, Paul's most loyal take in has vowed to seek revenge towards his once loyal buddies for Paul's death, but first he must track them down. With the love of his girlfriend and guidance of his house buddy mentor, Cameron has a view of a better life beyond his current surroundings, once he realizes that his former housemates have become the problem that Paul was trying to solve