AVILABLE AND IN STOCK FOR IMEDIATE DELIVERY!!! This Sig Sauer P556 is a semi-auto pistol that shoots the 5.56mm or.223 round. It has a 10.25" barrel and has a black finish. This is a used pistol and comes with a flip up front and rear sights, Sig Sauer STS-081 red dot optics, two 30 round magazines, sling mount, manual, and a soft case. This pistol uses AR-15 magazines.