Nice idea, but real life soldiers do not just drop their magzine every where. so personal i belive it will not need to be in the game.
Its a hollywood/battlefield fps shooter idea.
Soldiers only do this in very special situations.
It is very unrealistic, since you never know when you need your gear again.
Also a magazine is not just a drop and forget thing. In many armys it is considered as a kind of weapon part that the soldier especially in peace time will be held responsible for if he/she loose it. Also it might be nice to be able to fill it again when you have a short break from battle, you might not want to go and look for something but rather stay near your friends. ;-)
Im aware that some armys see a magazine as a use and throw away thing, and it is quite commond in some armys to throw magazines in the trash on the shooting range, while in other armys you need to give it back to the responsible weapons officer in the base that will dispose of it correctly ect.
And now that im talking about hollywood/fps games, it is not always a good idea to pickup magaines you find on the ground or on the enemy. They can in rare cases be boobytrapped with a mine/grenade, OR example a ak47 looking magazine actual are masse produced with explosives inside and are put on the battlefield on purpose.. The reason is that once someone pick it up and fire 1 shot or harvest the bullets, then the bomb inside the magazine will detonate and kill that person. These magazines can examble be found in the balkans/kosovo/bosnia, and they are rather difficult to see if it is a real or fake magazine... The same goes with hand grenades, you only need to adjust the metal trigger a bit on some hand grenades, and then the grenade will explode in 0.1 secound instead of example 5sec...
But all of that is a very long story.
what can i say humans have a very special talent for killing. Many soldiers are eager to see som action, but once they do many wish they never experienced it.