I thought it to be the case and I may be mistaken here that there is no fire weapon animation as such as an enemy will always stop and go to idle before shooting and that the fireing is therefore controlled internally by the engine called by the "use weapon command".
I must admit I have never checked each and every frame of an FPSC enemy character to see if it has actual shoot animation frames set to any of the animatoion sequences.
Whats this I see look at the manual animation sets I see one numbered 57 called NEW climb - now thats a thought - just need a ladder now to go with it.
"I am and forever will be your friend"