The Firing Line Forums - View Single Post - Expansion chamber- NFA item or no?

David Hineline · May 23, 2011, 12:33 AM

Most likely ok, but the only way to know is to measure the sound.

If your device reduces the sound then ports or not it is a silencer.

May 23, 2011, 12:33 AM	#5
David Hineline Senior Member Join Date: December 23, 1999 Location: South Sioux City, Nebraska Posts: 704	Most likely ok, but the only way to know is to measure the sound. If your device reduces the sound then ports or not it is a silencer.