Non spawning imported models

Ive tried every way i can think of or find on google to try and make this work but it wont.

I’m trying to install this shotgun fix and TF2 style Thompson

The icons appear in the spawn menu but when i click them they dont spawn.
If anyone can tell me exactly where to put the folders, if there is a setting i need to change or just what im doing wrong i would really appreciate it.