Going through Tech Manual and Tactical Operations, something odd came up.
LRMs can either be mounted as normal, mech-scale launchers (LRM5, LRM10, LRM15, LRM20), at normal weight.
They can also be mounted as individual tubes, which works rather better (lighter, usually). (This isn't the confusing part- I think it makes sense, and gives protomechs a nice little niche.)
Tactical Operations includes certian weapons- LRM 5/10/15/20 + Artemis IV.
The Artemis IV doesn't come separately for protomechs (as far as I can tell)- and there is no individual tube option for mounting singular tubes with Artemis IV either.
The same goes for SRMs. Is there something I'm missing, or is it only possible for Protomechs to mount Artemis IV systems in standard mech-size missle packs?