is possible to have custom animation for a specific weapon, such as karma chargers recent video where soldier has m1 grand with custom animation, so is possible.
but custom weapon plug in might not be able to support it sadly.

brass beast is most frightning minigun
cowards run in fear
is nice

server i play has custom weapons
i watched video earlier today that was uploaded today
showed immobile sentry
which server is this avaliable in?

sewing machine (minigun for heavy on workshop name may not be this but is similar to it)
fires 75% slower
fires fast projectiles
does 60 damage per projectile at meat shot range
long range 30 damage
point blank 80 damage
75% more accurate
only 75 rounds in drum

the leviathon
metal tank
200% slower rev speed
30% slower move speed while active
while reved 85% slower move speed
40% more accurate
50% faster fire rate
200% more ammo in reserves
25% damage resistance while reved
if fired for 15 seconds
overheats
while overheated
20% slower fire rate
bullets do 50% less damage
bullets lights targets on fire for 2 seconds
25% less accurate
aka
only 20% faster fire rate to stock
15% more accurate comapred to stock
50% less damage then stock
lights targets on fire stock dont do that
while being healed
twice the overheal
(not the 400 hp heavy cus thats kinda op would prob be better to just have 300 hp and do normal overheal so im saying this in terms of the normal heavy so 600hp)

there are still costom weapons on the servers but for example where did the jump action shotgun go? why did it get removed