Riley Defense RAK47-KRINK-WSF: This is our second pistol variant of the krink chambered in 7.62x39mm and measures 21 in overall length. This model comes with a plugged and pinned (4.5mm) 100-series side-folding rear Trunnion but without a side folding stock. - Black oxide finish - Serrated upper hand guard for positive grip - Lower hand guard with stainless steel heat shield and tactical pistol grip - Hinged dust cover - 4-piece muzzle brake with chrome-lined funnel - Fully Heat-Treated Mil-spec stamped Receiver - 4150 Nitride Barrel (8.5 length) 241.5 RH - Forged Trunnion - Forged bolt - Forged carrier with chrome-lined piston - Spring-loaded firing pin - Machined scope mount side rail - Gas block/Front sight combo - Bolt hold open safety lever - Extended magazine release - Magazine Capacity: 30 - Semi-Automatic closed-bolt action - Caliber: 7.62 x 39 mm