This rifle is a Model 98k Mauser, either captured as a whole rifle, or built from captured German parts by the Yugoslavians after the war.  The receiver is definitely German-made, as it bears the "Mod. 98" mark on its side.  It came with the sling, an ammo pouch (not shown), and the bayonet.  This rifle is pretty accurate - I can typically manage 1-2" groups at 100 yards with this one. Initially, I couldn't do a whole lot of testing, since after only 10 rounds, my arm was too sore to shoot it again.  Fortunately, since I got the rifle, I've gotten to the point where I can shoot about 100 rounds before I start to get sore.   In fact, I've even purchased a second 8mm Mauser to play with.   Still, it's kind of like putting a cannon on your shoulder (actually, this video is of a guy shooting a .577 T-Rex).