Percussion ignition

Forsyth's 1807 patent for a percussion mechanism is a definite historical milestone, but it does not mean that the copper percussion cap that later became widespread had already reached its established form at the same time. Percussion systems went through several ways of holding the priming material, with percussion caps forming one important branch.

Compared with mechanisms that relied on a match or sparks, percussion ignition improved resistance to moisture and reliability of ignition, and was gradually incorporated into later fixed ammunition.

In Chinese sources, “火帽枪” (percussion-cap gun) and “铜帽枪” (copper-cap gun) usually emphasize the specific construction using an external percussion cap. The National Museum of Taiwan History uses the name “火帽擊發槍” for an item in its collection, providing an additional example of Chinese-language classification of a surviving firearm. That entry alone cannot establish when such firearms were first manufactured or introduced in China.