Sweet. No tax stamp for a intrastate suppressor if this passes.
There is lots of precedent for this - not that I agree with the precedent, but bear in mind that law is based on brute force, not on logic or respect for tradition or agreement.
The Ninth Circuit, of all circuits, reversed a federal conviction, reasoning that the firearms in question never left California. The Supreme Court ordered the Ninth Circuit to reinstate the conviction, using the Raich (marijuana) case for support of federal jurisdiction over intrastate commerce.
I ponder, from time to time, what it will take to constitute sufficient political pressure to get Congress and the federal Courts to back off.