The NRA likens licensing, etc restrictive and against the spirit of the 2nd Admentment.
Americans have the "right" to own cars - but the government sets restrictions on how it can be driven, the necessary requirements to drive, and the necessary financial reserve needed in case of an accident (aka Insurance)
Guns are no different than a car - sure you can have one, but its perfectly 'ok' for the government to set guidelines to having one.
...so take THAT NRA!