What's so wrong about it? By the looks of it that thing's based on the Panzerfaust which is the only RPG I could find that has the projectile show up at the front and not use a pistol grip. I'd assume the added weight of the beefing up makes the thing too heavy to fire from the hip so he's shouldering it. That little thing he has his left hand on is the trigger mechanism, the PzF does not have a pistol grip like most other launchers.