I'd complain if I were you. The gun descriptions should match the gun stats. Which in turn means that when staff nerfs or buffs a gun, the description should change to match it. Otherwise it is false advertisement. That is unfair. The issue isn't about the messed up stats, but the failure to update the description (aka: the one thing that allows you to know what you're buying).
I know, it sucks. You should have bought a Shipka instead.