Restricting weapon mods based on receivers.

[ShadowRanger787]

Hello all, I've resumed working on my mod, the Handmade Rifle Extension and have pretty much gotten it to the state I want it except for one small thing. That small thing is the fact that I have multiple receivers in various calibers and styles that I want to restrict which mods can be attached to them, Ex: A shotgun receiver will only allow special shotgun magazines, barrels, muzzles, etc that have a special keyword i.e. Mark_kw_isshotgun etc etc. Any and all help would be greatly appreciated.