This triangle stock bolts to any standard 10-32 bolt pattern stock adapter or hinge, such as those offered by Stormwerkz, ACE Rifle Stocks and DPH Arms. Easily adapts to any AK, even a Yugo PAP pistol by simply drilling and tapping two 10-32 holes in the rear trunnion (make sure your pistol is registered as an SBR before doing this.) With a hinge installed, the stock will have the exact length of a true Russian or Bulgarian sidefolder stock. The rear of the stock has a machined rib pattern to give a good grip on the shoulder. The use of a hinge allows the stock to be configured to fold left or right. Made of 6061 aluminum that is bead blasted and hard coat anodizied. Weighs 15 ounces, 8.5" length. MADE IN THE U.S.A.