Garry's Mod

Garry's Mod

Stop Motion Helper
is there a way to make more things animatable with this tool?
I'm not sure how this tool works with what it can animate, but I would like to use this tool with Ryu-Gi's Muzzleflash Prop. Unfortunately, I can't select it for animation. I can do the "make animatable" but then I can't resize it to vary the muzzleflash shape once I do that. Does anyone know why certain models are not animatable and how I could possibly work around this? Or if anyone knows about a muzzleflash MODEL I could use instead? I don't understand how to use a particle or anything like that with sort of tool.