Here's a "summary" of the state statutes regarding "assault firearms" in my home state of NJ...confusing & disturbing at the same time!
"Assault firearm" means:
(1)The following firearms:
Algimec AGM1 type
Any shotgun with a revolving cylinder such as the "Street Sweeper" or "Striker 12"
Armalite AR-180 type
Australian Automatic Arms SAR
Avtomat Kalashnikov type semi-automatic firearms
Beretta AR-70 and BM59 semi-automatic firearms
Bushmaster Assault Rifle
Calico M-900 Assault carbine and M-900
Chartered Industries of Singapore SR-88 type
Colt AR-15 and CAR-15 series
Daewoo K-1, K-2, Max 1 and Max 2, AR 100 types
Demro TAC-1 carbine type
Encom MP-9 and MP-45 carbine types
FAMAS MAS223 types
FN-FAL, FN-LAR, or FN-FNC type semi-automatic firearms
Franchi SPAS 12 and LAW 12 shotguns
Galil type Heckler and Koch HK91, HK93, HK94, MP5, PSG-1
Intratec TEC 9 and 22 semi-automatic firearms
M1 carbine type
MAC 10, MAC 11, MAC 11-9mm carbine type firearms
PJK M-68 carbine type
Plainfield Machine Company Carbine
Ruger K-Mini-14/5F and Mini-14/5RF
SIG AMT, SIG 550SP, SIG 551SP, SIG PE-57 types
SKS with detachable magazine type
Spectre Auto carbine type
Springfield Armory BM59 and SAR-48 type
Sterling MK-6, MK-7 and SAR types
Steyr A.U.G. semi-automatic firearms
USAS 12 semi-automatic type shotgun
Uzi type semi-automatic firearms
Valmet M62, M71S, M76, or M78 type semi-automatic firearms
Weaver Arm Nighthawk.
(2)Any firearm manufactured under any designation which is substantially identical to any of the firearms listed above.
(3)A semi-automatic shotgun with either a magazine capacity exceeding six rounds, a pistol grip, or a folding stock.
(4)A semi-automatic rifle with a fixed magazine capacity exceeding 15 rounds.
(5)A part or combination of parts designed or intended to convert a firearm into an assault firearm, or any combination of parts from which an assault firearm may be readily assembled if those parts are in the possession or under the control of the same person.