I believe it’s 21.-been over 50 years since I had to worry about it. If you plan on carrying get a ccdw permit. It makes purchases easier, works in other states, etc. ALWAYs check the USCCA reciprocity map before traveling out of states. Laws are radically different in various states (prime local example is Illinois-carry there with a key permit and you’re a felon). Be careful out there. Know the law and follow it.