FILE - In this Feb. 28, 2013 file photo, a worker assembles 30-round capacity ammunition magazines for high-velocity rifles, inside the Magpul Industries plant in Erie, Colo. Magpul, one of the country's largest producers of ammunition magazines for guns, is leaving Colorado and moving operations to Wyoming and Texas because of new state laws that include restrictions on how many cartridges a magazine can hold. (AP Photo/Brennan Linsley, File)