i would add here all the mags that can go on several weapons.
Some are suitable with other weapons but are not made for so it,s not perfect.
75 drum mags is made for ak47 and ram7.
Suitable with:
grau 556 with the special connector.
ak47 mags is suitable with ram7 and grau556 with special connector.
grau556 mags is suitable with ram7 with special connector and also suitable with ak47.
ram7 mags is suitable with grau556 with special connector and also suitbale with ak47.