Chapter X Why do you let a 18 carry a Semi Auto.

Good Question

In the first place it is a Full Auto Assault Rifle, a American Standard M16 in the Past.
A Israel Design , Singapore Made SAR 21 Rifle now.

Some carry Light Machine Gun SAW, some carry Standard Machine Gun GPMG.
There is always Grenade Launcher and Small Rocket LAW.
The Biggest in a Infantry Unit is a 17kg, Rocket call 84mm Recoilless Rifle.