anything full automatic or capable of firing more than one round with a single pull of the trigger, includes tri-burst, etc. this also includes the parts to change a semi-auto to a full-auto(trigger groups, etc.) also all full auto parts/complete firearms must be manufactured after 1986, thus making them VERY expensive. a legal, transferrable select-fire M16 runs about $25k

any and all sound suppressors

all shotguns with barrells less than 18"

all rifles with barrells less than 16"

any handgun with a caliber larger than .50"

any handgun with a vertical foregrip, like a MP5

all explosive devices

all weapons that are not traditionally styled(the only way i know how to describe this group) includes suitcases which house a MP5 and have an external trigger, pen guns, cane guns, ring guns, etc.

 

I use the excuse that the barrel made it weigh too much.
My muscle usage ends at my upper stomach, so trying to hold a heavy *** barrel gets exhausting sometimes.