Do you realize, as of with vanilla, magazines are not discarded unless really empty? So if you do tactical reloads all the time, there be no magazines discarded.

And with sleeves you probably mean 'cases' (as in 'envelope of a projectile'), probably.

Edited for better readability.

He is talking about fake debris on the ground.

Thank you Fireball, yeah I mean empty shells as in ACE and empty magazines.

About magazines: You can hold some key modifier when press Reload button to keep empty magazine in inventory! CTRL+R for example :)
Something like that...
p.s. replace the empty mag for item, item can be droped or/and used for resort magazines, etc.