Ruger introduces a state-compliant model of the AR-556. This new model is legal for sale in the following, otherwise restricted locations: Colorado, Hawaii, Massachusetts, New Jersey and Puerto Rico. Similar to the standard AR-556, this model has a non-threaded barrel, fixed stock with 13.5-inch length of pull and a 10-round metal magazine. With a 16.1-inch barrel, the state-compliant model is 34.4 inches in length and weighs 7.10 lbs.