Sai Gong Chong (賽熕銃)

A Sai Gong Chong and its ramrod, from 'Bing Lu (《兵錄》)'.

Sai Gong Chong (賽熕銃 or 賽貢銃, lit. 'Gun that can match a Fa Gong') is another cannon designed by Ming general Qi Ji Guang (戚繼光). It is a three chi long muzzle-loading cannon, usually loaded with one lead cannonball weighing half catty, a departure from the standard practise of using multiple smaller shots in most Ming artillery.

Sai Gong Chong is a jack of all trades design said to combines the portability of arquebus, reloading speed of Fo Lang Ji (佛狼機) and firepower of Fa Gong (發熕). While it cannot surpass these weapons in their respective strength, Sai Gong Chong is nevertheless a very versatile weapon. As muzzle-loader, Sai Gong Chong is more powerful and efficient than Fo Lang Ji, yet it still retains comparable firing rate as Fo Lang Ji due to simplified reloading process.