Question

A part of the army that uses Large gun

Answer 1

Artillery unit of the Army uses the largest guns, sometimes also along with Infantry and Grenadier units. Since they fight on the front lines and cover the target within large ranges they used the guns with maximum aim range. One of the example is The Royal Canadian Artillery that uses the a 155mm howitzer as it's main gun whose bore is 155mm wide.

Answer 2

Artillery gun

Artillery gun is one type of heavy weapon used in army. Initially the artillery development is focused on its ability to breach fortification. So it was very heavy. Now technology is improved the Artillery gun become lighter.Now mobile field Artillery are available.Artillery is  developed to use against ground target.Artillery means canon and it is also called shell firing gun