Brotherhood of enlightened Galil users.

This is a place of worship.
This brotherhood believes that the Galil is a firearm sent by God.
For a mere $1,800 you get a rifle that matches, if not exceeds the M4A4 in many ways.

Facts:
The Galil does more damage against armour than the M4A4.
The Galil has the same firerate as the M4A4.
The Galil has less damage dropoff than the M4A4.
The Galil has better recoil recovery than the M4A4.

Now, some may say that the inaccuracy of the Galil is a major issue, however, that is what we like to call a "Skill Issue".
The Galil may not be as accurate as an M4, however its inaccuracy is greatly exaggerated. It is more accurate than any SMG in the game, and for anything besides tap fire it is very comparable to the M4, albeit not as accurate.
The 2nd shot fired in a burst by the M4A4 has the same inaccuracy as the first shot of a Galil, as a point of comparison.
The way to get around it is to simply play to it's strengths, if you are CT, hold site angles that do not have long sightlines, if you are T avoid areas like Long A on Dust 2.

Praise the Galil, it will never 98 in 4.