Sig Sauer R556762R16B 556 Russian SA 7.62mmX39mm 16" 30+1 Adj Buttstock Stk Blk Sig Sauer is offering several variants to its tactical platforms. Leading the way is SIG556 Russian, chambered for the widely used 7.62 x 39mm caliber. Using AK-type magazines, the shooter now has a more potent round for small to medium game. The SIG556R features a distinctive foldingstock, and an M1913 rail for accessory attachment. The 16"barrel features four-groove rifling and a twist rate of 1:9.5". At its fullextension, the SIG556R measures 36" but can fold to 26", making it idealfor situations where maximum maneuverability is required. For SpecialForces requiring an accurate, more potent rifle, chambered in 7.62x39mm.The latest revisions to this rifle have solved the problems some had when these rifles were first introduced 18 months ago. The magazine shelf has a steel insert on the lower receiver to allow the use of steel magazines withoutdamaging the receiver. The ejection part has been enlarged, and the firing pin spring strengthened to give a solid punch to those harder AK primers.Price listed is the cash/money order discount price. For credit card purchases add 3% SPECIFICATIONS:Mfg Item Num: R556762R16B Caliber :7.62mmX39mmBarrel Length :16"Capacity :30+1Trigger :StandardSafety :LeverOAL :36.1"Weight :7 lbsStock :AdjustableFinish :Black