For some reason, when I put a grenade launcher on the Magsling rifle, it just... breaks for some reason. Can't aim it up or down, can't use the grenade launcher, and the sprite for said launcher is duplicated on either sides of the weapon (Top and Bottom). Oddly though, it is JUST the Magsling, as it works with the M1000 Classic just fine (even before the recent update) and other modded GIC weapons like in the Black Ops expansion.

Starbound Log below, the error starts at '2820' and under.
https://pastebin.com/2jkAARp1