FOX News has the story which affects people in states such as Arizona and Colorado, which allow patients to use marijuana products with a doctor's prescription:
While some citizens may have won the right to use medical marijuana, winning one right may come at the expense of another.
In a letter to firearms dealers across the country, federal authorities are being clear that firearms should not be sold to medical marijuana users.
The Alcohol, Tobacco, and Firearms agency (ATF) is sending a letter to gun dealers warning them it is illegal to sell the weapons to people who admit smoking medical marijuana and have a medical marijuana card -- something the card holders are unimpressed about.
"I'm a medical marijuana patient and I own a gun," says Arizona resident Sunny Singh, who fears his right to carry a firearm will be affected.
"A lot of these people who really need medical marijuana as a medicine shouldn't be targeted or have their rights taken away...."