MasterPiece Arms MPAR 556 Sporting Rifle is chambered in 5.56×45 (.223 Rem.) and accepts AR-15/M16 magazines and Drums. The MPAR Sports a heavy stamped-steel receiver, 16-inch barrel with a 1:9 twist .
If you would like to find out more about the MPAR 556 Sporting Rifle you can find the listing HERE