Describe the solution you'd like
Animation for gun items, this will look great on gun servers.

Describe alternatives you've considered
Mo' Bends will rely on ItemStack's NBT (eg: itemType: Gun) and give player a gun animation when holding that item.
Server devs will put that NBT tag on items to get animations.
I don't know if it is possile for a client to read an item's NBT that is held by another player.