SIG SAUER introduces the SIG 556 Classic semi-automatic rifle in 5.56 NATO. The SIG 556 Classic features a full-length gas piston with a two-position gas valve, Swiss-type folding stock and a polymer forend. Its steel receiver features a Picatinny rail with a SIG SAUER Mini Red Dot Sight and an improved combat-style hooded front and flip-up rear sights. The Classic has a 17-inch cold hammer forged barrel. SIG SAUER shaved a pound off the Classic model by incorporating the redesigned alloy trigger housing, AR-style magazine and flash suppressor. Two 30-round polymer magazines with connector are included.