Musket

Arquebus was further refined into a Musket, first weapon to pierce armor. Armor penetrating meant armor was obsolete. Muskets remained principle small arms for 2 centuries, but still difficult to reload.
 1565 Musket

Arquebus was further refined into a Musket, first weapon to pierce armor. Armor penetrating meant armor was obsolete. Muskets remained principle small arms for 2 centuries, but still difficult to reload.