Elvis wrote:§ 42.01. DISORDERLY CONDUCT. (a) A person commits an offense if he intentionally or knowingly:
(8) displays a firearm or other deadly weapon in a public place in a manner calculated to alarm.
Based on the above law if you were to walk into a bar with a long gun and the Police were called you will be charged and convicted with Disordery Conduct. I have seen it happen many many times all over the State. If someone calls 911 to report the incident they were alarmed. On the other hand I have been to a local skeet/sporting clays club that has an alcoholic beverage license for on premises consumption and there is a gun rack just inside the door. No one is alarmed that you have a shotgun at a skeet range and so Disorderly Conduct does not apply.
It's been decided many times that the mere presence of a firearm does not cause alarm