Yes I have .. Heavy on the recoil though...
In my Army time I have operated both versions the MG-3 and the upgraded MG-3
MG 3KWS.
by the way thats me ^^
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For me all the listed points by you are battle advantages which may could help be to kill the enemy faster and precise.
1.drum- is better than belt, because belt get dirty very quickly and JAMS
2.optics- with that I can aim faster and more accurate than my enemy
3.handle - is perfect because it is easier and more comfortable to carry the machine gun.
Such in this situations:
Underarm Firing Position. This position is used almost exclusively when moving in and around the objective during the assault, when a heavy volume of fire in the target area is required, and when rapid movement is not necessary.
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Se how this Pakistani Soldier is handling the MG-3, his hands can be burned when he fires more than 100 round because the barrel gets very hot and it is very difficult to aim at the target without the handle ! Notice also the hanging ammo belt !
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