The Heym Express Magnum is a series of very powerful German rifles of the 1990s designed for hunting big game. They are available in 19 different calibers from the .300 Win Mag to the hugely powerful .500 Jeffery and .600 Nitro Express. Rather similar in appearance to the Mauser Gewehr 1898 (even if more massive and with an exposed barrel), they use a Mauser-type bolt akin to the one of the aforesaid rifle, even though the bolt is much more solid in order to handle better the huge recoil.