Loving the update, noticed a few things however. Checked them with NIA & CBA being the only mods loaded - in case it was a conflict - and the issues still present:
AK-74M (MTK) - magazine model is not visible in 3rd person (in game and in the arsenal), however it is visible in 1st person view.
HK MP5N (9mmAR) and HK33A2 (RIS/GL) - not able to mount optics on the weapons (either from the arsenal, or dragging an item onto the weapon in the inventory).
M60 - when switching to the mixed 200 round belts, the weapon changes to the M60E4 model.