At your own peril.
http://www.nraila.org/news-issues/in-the-news/2014/11/marijuana-cards,-gun-ownership-combination-remain-a-legal-risk.aspx
Marijuana cards, gun ownership combination remain a legal risk
Posted on November 14, 2014
As the use of marijuana gains acceptance for both recreational and medicinal use, owners and buyers of firearms should be aware that the federal government still doesn't believe the two should mix, according to authorities in both fields. They add that the chance of prosecution for a federal felony, while not highly probable, is nothing to take lightly.
<broken link removed>
http://www.nraila.org/news-issues/in-the-news/2014/11/marijuana-cards,-gun-ownership-combination-remain-a-legal-risk.aspx
Marijuana cards, gun ownership combination remain a legal risk
Posted on November 14, 2014
As the use of marijuana gains acceptance for both recreational and medicinal use, owners and buyers of firearms should be aware that the federal government still doesn't believe the two should mix, according to authorities in both fields. They add that the chance of prosecution for a federal felony, while not highly probable, is nothing to take lightly.
<broken link removed>