My dealer said sometime in Nov? Here's a bit more info on the 556C;
Sig press release on the 556C
SIG SAUER® Introduces the SIG 556 Classic
EXETER, NH – SIG SAUER, Inc., the leading manufacturer of commercial, law enforcement, and military firearms, is proud to introduce the next generation in the evolution of the SIG 556 platform with the new SIG 556 Classic model. The legendary performance and accuracy of the Swiss-built SG 550 tactical rifle is found in every SIG 556 and further enhanced in the new SIG 556 Classic. The Classic is a semi-automatic rifle with the silhouette that harkens back to the original military-only 550 model. Featuring a full length gas piston operating system with a 2-position gas valve, the rifle will keep operating even when the environmental conditions deteriorate. Available in 5.56 NATO, the Classic features a Swiss-type folding stock that adjusts to length, as well as a Swiss-type polymer ergonomic forend.
The SIG 556 Classic’s 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’s sleek profile and compact length is enhanced by a 17’’ 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. The SIG 556 Classic brings back the look and feel of one of the world’s most sought after military rifles but on a platform available for law enforcement and responsible citizens. MSRP is $1998.00.
SIG 556 Classic Specifications:
Caliber—5.56mm NATO
Overall Length—37.1”
With stock collapsed—34.3”
With stock folded—28.1”
Stock Style—Swiss
Barrel Length—17”
Forearm—Polymer
Sight Radius—18.1”
Rifling—1 in 7”
Number of Grooves—6
Weight (w/o magazine)—8 lbs. 2 oz.
Magazine Capacity—30 roun