a Mauser rifle probably unknown outside of germany, the "Zoll" or customs carbine was made in the early 1950s by Heym for the german customs as a more civil version of the 98k with new barrelled actions coming from FN in belgium. because of its indestructebelility and its is more like a hunting rifle this gun is loved by dog handler when searching for wounded game.
excellent exemplar http://egun.de/market/item.php?id=5903361