ISBN: | 978-5-5117-2920-6 |
High Quality Content by WIKIPEDIA articles! The SR-556 is a semi-automatic rifle carbine manufactured by U.S. firearms company Sturm, Ruger Company, Inc. The rifle was introduced in 2009, marking Ruger`s entry into the popular AR-15 market. It is one of several new AR-15 platform rifles to utilize gas piston operation.