information:highlighting, structural:reformatting, stylistic:tone
Modern guns

Several developments in the 19th century led to the development of modern guns.

In 1815, Joshua Shaw invented percussion caps, which replaced the flintlock trigger system. The new percussion caps allowed guns to shoot reliably in any weather condition.

In 1835, Casimir Lefaucheux invented the first practical breech loading firearm with a cartridge. The new cartridge contained a conical bullet, a cardboard powder tube, and a copper base that incorporated a primer pellet.