Just a brief addendum to the FAQ that the Seattle Police were so gracious as to supply, guns and pot don't mix.
Well, neither do guns and getting drunk but pot has some special federal complications - our friends at the ATF point out that if you lawfully (under state law) purchase, sell, use or whatever marijuana that you are barred (at the level of a federal felony) from the purchase or use of firearms or ammunition.
In other words, wave goodbye to the Second Amendment if you light up...
It took a constitutional amendment to ban alcohol - why doesn't it take one to ban marijuana?
Credit to Dave Workman for his substantially more complete coverage of this topic.