Some players, me included, has experienced a content lock of gear.
If I want to equip a ERCO on an MX it does not let me.
It works fine if I have a SPAR.
The Virtual Arsenal does not even give me the option to equip such optics if I have equipped myself with an MX - it is not shown under optics for the weapon.
This also includes the new reskinned RCO and ARCO.
The MX SW (Khaki) does also not have an Bipod equipped when I have it, but a friend - where the scopes are also working - can see the Bipod on his SW and also on mine.