User blog comment:Willbachbakal/My BioShock Sequel Idea Dump/@comment-1330314-20100508011617

Yes, the Railgun. Congratulations on finding it!

Also, thanks for offering to help, although I've come up with the ammo types for every weapon since quite some time already. If you think your ideas are good enough, you could create your own weapon and post it on the wikia.