No games nor films here but like Greg Savage, I do field recordings. Most of those kind of recordings I have are naturally smaller arms. For more special weapons and FX, I have sample collections.
Even free sites have some, like Freesound:
https://freesound.org/search/?q=weapons
I can see how Weaponiser could be good if you need a wide variety and ability to fine tune, but no experience about that one.