I know what you meant. You do not have "de facto" custodial rights to the use of property that you do not own, which would include the roads. You have a right to use your own roads, and if the state required you to obtain a license to use your road, that would be an infringement on your custodial rights.
A license to purchase a gun is an infringement in the market. The state does not own the gun (just as it does not own the private roads), and therefore cannot enforce a registration or licensing program without first obtaining its own "de facto" usage rights to the weapons. It does this by force, hence the infringement.
Licensing in itself (understood to be legal permission) isn't an infringement; it's the forceful acquisition of custodial rights that is. If the state simply contracted the weapons makers devoid of coercion, then there would be no market infringement, though I'd still take issue because that's not a proper function of government.