With this mod you can fire upon Ships from the valkyrien skies mod with Crayfish's guns.
Credits to I Ate Minecraft for the image, Endal for most of the code, SlimyAr for assistance.
You can make forks of this mod, add it to public modpacks, and even upload it to your google drive for saving a modpack for friends to play with, but do NOT upload the mod to other platforms. (Mainly because I don't want to make it harder for people to find an updated version of the mod.)