User blog comment:Damac1214/Black Ops II Patch Notes + Micro-Transactions on the Way/@comment-4619585-20130312213011/@comment-5596583-20130313041956

Actually, there's nothing wrong with the Peacekeeper's muzzle flash. It appears to have two flashes because the muzzle brake redirects it out to either side. Look closely, it does the same thing in first person.