Do you know that if you have a concealed and carry licenses in the State you LIVE.
If your thinking about applying for a Medical Marijuana card in the state that you live in. Your state may exempt you from prosecution, marijuana is still a scheduled one drug and you can be prosecuted by the Federal Government.
If you try to purchase a firearm, on the 4473 form question # 11 c Are you an unlawful user of, or addicted to, marijuana or any depressant, stimulant, narcotic drug, or any other controlled substance?”
Source: BATF Form 4473
If you say “no” and you use cannabis or cannabinoid products, that could be perjury in the eyes of the Federal government. If you say “yes”, the FFL vendor has a legal obligation to deny the sale of the firearm.
KNOW YOUR STATE AND FEDERAL LAWS. “ITS YOUR RESPONSIBILITY”