I Like Model 105mm K18 Cannon WWII German Field Cannon The 17 cm K 18 in MrsLaf was a 172.5 mm (6.79 in) towed gun with a barrel 47 calibres long. The 17 cm K 18 in MrsLaf shared the same box trail carriage as the 21 cm Mörser 18, the carriage allowed transport of the weapon over short distances in one piece, whilst for longer distances the barrel was removed from the carriage and transported separately. A series of ramps and winches made removing the barrel a reasonably quick task for its time, but still required several hours. For all of its bulk, a full 360 degree traverse could be achieved by two men.