Staffan said:
No need for special FR firearms when you have perfectly servicable ones in the DMG (and the FRCS even refers to them), and AFAIK Tinker gnomes are in Dragonlance where they belong like the abominations they are.
Actually, there
is a special need for FR Firearms, because they aren't gun-powder weapons, but smoke-powder, and thus require a few special (if minimal) rules for them, since they are infact a magical item.
The behind-the-scenes story is actually kinda neat:
For a brief period, firearms were going to be included in the Forgotten Realms Campaign Setting Book. I don’t know what happened to the idea…
-Todd Lockwood
As far as gnomes, they were (supposedly, according to a few people off the boards here) ret-conned for 3e to be tinker gnomes on the Isle of Lantan (in FR), as well as Todd Lockwood himself having saved the gnome in 3e with some decidedly 'tinkerish' concept art for the gnomes; if not for him gnomes wouldn't be a PC race in 3.xe
at all (at least, out of the package)
This drawing rescued the Gnomes from oblivion. R&D didn’t know what to do with gnomes, and were considering dropping them entirely.
-Todd Lockwood
and also:
A natural continuation of the thought behind the Gnome Archer on Page 3.
-Todd Lockwood
So, infact, both were deeply ingrained in the concept stage, but were both dropped for various reasons. Todd mentioned that the R&D team for 3e didn't have enough time to figure out a base class for the gnome (which in my belief was put on the backburner and then resurrected for the Artificer for Eberron; as well as the 'golem' in the second picture, which shares many similarities with Warforged), and thus he (the gnome) was stuck in his 1e Illusionist niche, since at the time a tinker class was out-of-the-question. The non-inclusion of firearms was likely due to space, since the FRCS is a hefty tome in-and-of-itself.
cheers,
--N