Because of their technically obsolete status, you can purchase an SKS if you have a $30, three-year Curio and Relic (C&R) license from the ATF. And it's only one of many "curios" available, including such classics as the 9-millimeter Browning High Power, Lugers and some Colt .45s.
One gun dealer said a client had a Thompson submachine gun delivered, the gun made famous by the St. Valentine's Day Massacre. The gun was modified to fire only semi-automatic, meaning one shot is fired with each squeeze of the trigger, so as not to violate federal law.
The big advantage of a C&R -- these aging guns are legal for interstate transport and sale. Buyers are deemed by the ATF to be a "collector."
Some states place additional restrictions on those applying for a C&R license. For example, Illinois requires applicants to have a Firearm Owners Identification
(FOID) card, which entails a background check, no felony convictions and no mental illness. But for the average applicant it takes only 15 minutes to apply for the license, according to one website in the state.
Obtaining a C&R license in other states can be trickier. Firearms advocates consider New Jersey "gun unfriendly," for example, so an application for a C&R is referred to the state police, who then pass it along to the municipality. Local officials may reject it or treat it as a traditional Federal Firearms License, which requires multiple approvals and permitting.
In contrast, neighboring Pennsylvania is considered an easy state to get a C&R. Residents can get an SKS or other weapon delivered to their home, gun dealers said. Other "right to carry" states are equally liberal.