An arquebus is a form of obsolete matchlock firearm.
The arquebus was invented by the Spaniards during the 15th century. The arquebus is also called the harquebus and was a type of firearm.
An arquebusier is a soldier who is armed with an arquebus.
An arquebusade is a shot fired from an arquebus.
arquebus
The arquebus was important because it was one of the earliest firearms, revolutionizing warfare by providing an effective ranged weapon. It played a significant role in transitioning from traditional hand-held weapons to gunpowder-based firearms. The arquebus improved military tactics by increasing firepower and range on the battlefield.
blueprints/drawings and raw materials of wood, steel/iron, etc.
An arquebus (/ˈɑːrk(w)ɪbəs/ AR-k(w)ib-əs) is a form of long gun that appeared in Europe and the Ottoman Empire during the 15th century. An infantryman armed with an arquebus is called an arquebusier. Image courtesy: Google
A caliver is a form of light musket - an improved form of an arquebus, the caliver was introduced in the 16th century.
Early black powder large caliber smooth bore musket. IIRC, muzzle is slightly funnel shaped to assist loading.
That would have to be the early firearm. The Arquebus. In no way could early armor defend from that weapon. For castles, the cannon would end that form of defense.
They used matchlock and wheel-lock firearms, which were barrel-loading single-shot weapons that used external application of gunpowder. These included pistols, muskets, arquebus (a kind of large-calibre heavy rifle that was supported on a bipod), and of course heavy cannon.