It is not illegal to carry a weapon in your vehicle, as long as you have the proper license or permit required by state law.
However, when you are pulled over by the police, and have the weapon in your car, one thought in your mind is that you have a gun in the car and you are not sure how to approach the subject. Depending on what jurisdiction you are in it is permitted to have a gun in your car, as long as you are complying with the law. Most of the time all this involves is either having a concealed permit or storing your weapon in a place where it is not readily accessible. As long as you are in compliance with the law it is not a problem.
Once your registration on the vehicle is run through the DMV if you have a concealed weapon permit or not dispatch will advise the officer. Should you have a weapon in your car go ahead and tell the officer up front. If you have it legally than there is no reason to worry, the officer is just being safe.
The officer may ask where it is or run the serial number but it will not be held against you unless you stole the gun or cannot legally possess it. In being honest with the officer, you will gain much more respect and trust from the officer if you say upfront that you have a gun/weapon in your car. There is nothing wrong it, and the majority of officers support legally having firearms. At the end of the day we all want to go home and if we know any safety risks up front it puts us all in a better mood.
