Why not? Wouldn't the LEO be performing his duty under the law by verifying the OC individual is in legal possession of the weapon?
Wouldn't the LEO be performing his duty under the law by pulling over anyone who is traveling at the speed limit and obeying all traffic laws to verify that they have a current and valid drivers' license?
Not a blacksmith could be found in the whole land of Israel, because the Philistines had said, "Otherwise the Hebrews will make swords or spears!"
1 Samuel 13:19