This mod now forms a basic framework to enable patched weapon mods for Horizon to have their own custom ammo sets as well as management of attachments (such as toggling laser sights on or off) through the weapon kit. If your a user then just download the Framework file (highlighted as the main file) and ensure the plugin loads after Horizon.esp but before the patch plugin for your chosen weapon mod.

There is a separate plugin and download containing templates and a quest to allow Horizon Weapon patch authors to add custom ammo sets and attachment management for use with the weapon kit.

Note: There is also a guide (Nexus Article) for using this mod/framework.

Discord Post: A few posts where Sars99 discusses weapon attachments and magic effects.