Riley Defense Krinkov, AK Pistol, Semi-automatic, 7.62X39, 8.5 Barrel, Matte Finish, Black, Polymer Pistol Grip, Adjustable Sights, Manual Safety, 30 Rounds, 1 Magazine, Includes Plugged and Pinned 4.5MM Side Folding Trunnion Without Stock RAK47-KRINK-WSF This is Riley Defense's 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.