The Gateron + Linear Switch is a rail bottom-out full travel switch. On top of the Gateron classic milky housing and POM stem, Sensy requested Gateron to upgrade the leaf to match modern-day custom keyboards' PCBs, which come with 5ms of delay or less.
Furthermore, different from any other factory lubed Gateron switches, the + switch comes with a customized lubing solution: The factory lubed ones come with lubed stem legs, spring, leaf, and top housing contact points only. The stem walls and bottom housing rails are left dry to prevent lube pooling.