NPCs reloading and reloading forever

So, I’ve downloaded some SNPCs, obviously, and I especially like my SMOD Mercs and HECU Marines- however, there’s an issue. With most of the SNPCs I’ve downloaded (save for the bandana-wearing HECU grunts, for some reason), they’ll empty a few magazines, then they’ll start to do nothing but reload over and over again.

halp pl0x?

For clarity purposes, I got the SNPC packs at the following locations:

HECU:
http://www.garrysmod.org/downloads/?a=view&id=51063

Mercs: