This has been bugging me since I first started to play the ArmA series about 2.5 years ago, all weapons have a designated magazin look that doesn't change, even when you load in another magazine type, this is especially unlogical with the new "modular" weapon system of ArmA 3 that allows the weapon to have it's look modified.(With the attachements and similar things)

So what exactly i noticed is the following:

When you load in a 100Round 6.5mm Stanag magazine into any weapon except the MX SW it looks like a regular 30Round Stanag Magazine.

When you load in a 30Round 6.5mm Stanag magazine into the MX SW it still looks like it were a 100 Round magazine.