Resident Evil 4 - 15 Medallions and no Firepower updgrade for the Punisher?

I just picked the last of the medallions (the 15th), before entering the church. The merchant doesn't have an option to updgrade the Punisher (I got it right after I shot the 10th medallion), and it doesn't happen automatically...

Anyone?

You get more upgrades the further you progress in the game; you won't be maxing out any gun any time soon.

And you really shouldn't upgrade your guns until you get a Red9 (or Blacktail), TMP, Semiauto Rifle and a Striker. Upgrades aren't prohibitively expensive to start off, but the bonuses for upgrading are extremely small for inferior guns and you will need the money later.