Bond, are you interested in adding AirMod support to some (or all) of your weapons? The thread is here:
http://forum.thegamecreators.com/?m=forum_view&t=127029&b=21
On the last page you can see some videos of the latest updates. Errant is already really, really into the mod, and since it is open source, other modders can use it with ease. I'm hoping it will be part of the official FPSC build by migration. Anyways, I think you'd be particularly interested in the ability to have up to 2 additional firing animations that are randomly selected to be played (so 3 different animations can randomly occur) and the new blocking ability, which, using a new script command aswell, allows the player to block an enemy's melee attack (although the character's script must be modified for it). There's also a noscorch flag for the gunspec to keep a weapon from placing bulletholes (ideal for melee weapons, as are the above) and the ability to change the distance of the weapon's sound (so melee weapons don't alert enemies like a gunshot would, for example).
If you're interested I can send you the latest beta of 0.6, which is currently unreleased, to check out these new features.
EDIT: Oh, and since all of the new features are gunspec settings, your weapons will still work in standard FPSC without further modification.