the Turkish Mauser (Ankara 1938 and beyond) are large ring, full length actions that the Turks required Mauser to build with small ring threads, so they could use leftover Model 1893 barrels. So any Model 1898 full length bolt should fit your Turk,,,look on Gun Broker for one already forged or rewelded. or their are some gunsmith services to charge to do your bolt. I recommend welded versus Forged since the welded bolt give you a lil extra length. Numrich (Gun PArts Corp) has some nice checkered bolt handles for welding...