Caught this one the other day. A small odd little flick that was quite entertaining.

There's a militia group, with their arsenal of guns in a vault. They are awoken by the sounds of distant automatic gunfire and explosions, and hear on the radio that a police funeral has been shot up.

Realizing that their militia will be the first people the cops come for, they rush to the vault and find one full auto weapon missing, and only they knew the combination to gain access.

There follows an intense claustrophobic 'who dunnit'

Because everyone is armed to the teeth, the option of just beating the truth out of someone is not an option, so it's all about questioning, picking gaps in stories, and digging around in each others professed past.