Wikipedia
thumb|Koncerz A koncerz is a type of sword used by Polish-Lithuanian hussars in the renaissance period. It is thin and long and generally used by a type of heavy cavalry ( husaria, the famed Polish hussars) to penetrate armour plate, but not to slash.
The koncerz originated from a medieval sword and appeared at the end of the 15th century when it was about long, quite heavy and badly weighted. By the late 16th century it had increased in length to a typical overall— blade—and was much better designed. The koncerz was a stabbing sword, used more like a spear and it provided a rider with a very long reach. It had no cutting edge, only a sharp pointed end, being triangular or square in cross section.
The closest western European equivalent is the estoc, or "tuck".