IMHO to have a firearm and pot on your person at the same time would be at your own risk.
Regardless of State Law, Federal Law makes pot an illegal substance. To purchase a firearm you would have to lie on the Form 4473 which would be a violation of Federal Law. A "user" of a prohibited substance is also a person prohibited from possessing a firearm. http://<br /> http://www.justice.go...ts/guncard.pdf
I guess it's up to the individual to decide if they want to risk a Federal Charge or not.