Hi there,
I'm certainly not the legal expert but the way I understand it is:
-Pump guns from anywhere are not included
-Domestic Semi auto SG's allow for high cap mag extensions
-Imported semi auto SG's DO NOT allow for more mag cap than factory because to do so would bring the total number of imported parts to 10 or greater making it illegal. In the event you buy as many domestically made benelli parts for your SG and can produce a semi auto with less than 10 importes parts including the high cap mag extender, then you're OK. Unfortunately this isn't possible due to the lack of domestic parts.
Again, this is just my interpretation.
Please correct, clarify or expand
