What suppressor?
See how simple that is?
Firewall has a much better plan: "No Mr. ATF agent, that's my trust's inconel and titanium bud vase. Isn't it pretty?" If that doesn't work, he will try "Suppressor? What are you talking about? That's the salt shaker. You can tell because there is only one hole in the top. I lost the pepper shaker, but it had 5 holes."