Thanks for the replies everyone. My goal is to make them for myself. I don't want any parts of selling firearms or the accessories that go with them.
I have access to a lathe and tools, but I'm also open to just buying a suppressor because I think I may only need 3 total in the foreseeable future.
Handgun: Kel Tec PF9
Shotgun: Mossberg 500A
Rifle: Mossberg Tactical .22