Sir,
You may want to check with your local law enforcement agency! You may also want to check the Alchohol, Tobacco, and Firearms website. In many areas there is a minimum length on a barrel and anything below that is a felony offense.
Respectfully,
Gerald D. Hodge, Jr.
War Between the States Historian
Historian: 39th Georgia Volunteer Infantry Regiment
http://39thgavolinfrgt.homestead.com/39thHomepage.html