There is also the problem that clips aren't used to reload these weapons. Each time individual bullets get loaded in. Here is a historic reason as to why you should use clips instead of manually loading rounds.
If they decide to implement any of this. This will be a balancing act for soc developers. Because you either have clips on you or individual rounds. Meaning you either load whole clips in and don't allow manual reload of extra rounds. Because technically you don't have any rounds on you so you would need to get rounds of clips.
These are just quick thoughts. But thinking further you would need some vodo magic if they did want to implement a combination of the two.