You cant -_-. The only Rocket Launcher you find and get is in the Final Boss fight in Leon's Campaign. It would be stupid for it to have infinite ammo when you cant find it anywhere else but that one part.
Edit:Why the hell would you make the same damn topic again when you allready got an answer before? --- Pokemon White 2 FC:4685-8577-8710
on page 93 of the resident evil 6 book it said equip the rocket launcher infinite ammo skill while replaying leon's chapter 5 . the rocket launcher is then permanently added to your inventory with infinite ammo.
Which Resident Evil 6 book? It's completely wrong on both accounts.
It was in the official guide. Guides are written months in advance, so I figured they were planning to include it at one time and later changed their minds. --- More and more, I find myself wondering if it's all worth fighting for...for a future without fear...yeah, it's worth it. (Chris Redfield)