No, it has to be integrated or else you need a permit. I think Tom was talking about this for his raccoon problem.
http://www.airgundepot.com/gamo-whisper.html
It’s also got to be (for a BB rifle) longer than 16”, or it’s an SBR, and requires a $200 tax stamp. One of my AR-15s is an SBR w/ suppressor, two $200 stamps and pages of documents.