I seem to be the only one to report this so I am not sure what I've done to have this happen.

but this is what it looks like in the creative menu.

but the weapons do not render anywhere, Inventory, Hand, Etc...

Its Iguana Tinkers' Tweaks causing this, I know that much for sure.
I tested with only Mantle, Tinkers Construct, and Iguana Tinkers Tweaks installed and this happened when i added in ITT.

as I usually say, my apologies if this is redundant or wastes your time due to my ignorance.

okay... so i deleted the config files and its fixed... i'd have to go through the configs and see what differs from the default configs. this might take a while...

it seems that it was something in the MaterialOverride config. perhaps because it was generated before the Ranged Weapon update the newer materials were omitted in the config and create blank textures. The difference can be seen here:

New Config - http://pastebin.com/jPsKPfbJ
Old Config (causes the render issue) - http://pastebin.com/uFhUgyy1

adding materials to the "Insert materials to change here" part of the file makes the texture for the new weapons disappear. I don't know what this information means to you but i hope this helps you figure out any issues this may cause in the future.