Original Item: Barrels from the British 9mm Lanchester Sub Machine Gun which was the British pre-WWII copy of the MP 28 SMG. Could perhaps be used, with slight modification, with original MP 28 Parts Sets.
Lanchester SMG barrels are available in two main variants: Those secured with a screw in the the front end of the barrel that attaches to the barrel jacket, and those secured with a notch at the back of the barrel near the chamber.
This barrel is the version with the screw at the front, complete with the attaching screw.
Note: This is a "Short Barrel" under 16 inches in length. All NFA rules apply.