It might also be a reference to the famous gallery demonstrating a person making a fully functional AK out of a shovel. Unless absolutely necessary crouching is highly unadvised because of the slower movement speed making you an easier target and the unnecessary accuracy boost as the AK is very accurate even when moving and shooting.
Depending on what helmet the target has, a headshot will do as much damage as 2 chest shots. Up to medium and long range you will want to avoid full spraying and shoot in bursts, not just to conserve ammo but also improve bullet efficiency and have a higher accuracy as the first few bullets are more accurate than the latter ones. Up to 100 meters it is beneficial to crouch however you will be vulnerable as it is easy to hit slow moving targets, even at long ranges.
Crafting just isn't sustainable due to Him and the rare rifle body component demands. This tip explains why you always see clans of all sizes, no matter how much farming capacity they might have, collect as many AK's from the ground as they possibly could. Well, if the initial section of a script starts with #Non ...