Gateron Cap V2 Milky Yellow 50g

Yes. They ship factory lubed, which is a big part of why they feel smooth out of the box and why most people skip hand-lubing them entirely.

Actuation lands at 50g, putting it in the medium-light linear range — a touch firmer than a standard Yellow but still comfortable for long typing and gaming sessions.

Generally no. Stem wobble is well controlled and the milky housings fit snugly, so films offer only a marginal improvement for most builds.