Psychon Invaders (2006)

Sarah McKinnis a software engineer at a weapons factory is accidentally shot in the head by a new type of riot control pistol From that moment her life becomes a nightmare People appear to her as hideous aliens but shes the only one that can see these creatures She tries to warn her normal looking supervisor Ed Devon but the evil space creatures massacre everyone at her laboratory Sarah escapes with the pistol The aliens kill her sister in retaliation She wages a lone war against the extraterrestrial menace shooting and killing the army of hideous green skinned monsters from space But how can one woman stop this hidden invasion from the stars