Colorado’s law bans the sale, transfer and possession of magazines holding more than 15 rounds
It went into effect on July 1, 2013. Known as House Bill 13-1224 while it worked its way through the legislature, the large-capacity magazine ban was part of a package of gun restrictions that also implemented a universal background check requirement for purchases and required buyers to pay the background check fee. In reaction, voters successfully recalled two Democratic state senators who supported the laws, Sen. John Morse of District 11 and Angela Giron of District 3.
But DIY assembly kits have provided a loophole in Colorado
A series of undercover investigations by 9News revealed gun stores in several Colorado counties selling disassembled large-capacity magazines in parts after the ban went into effect.