The whole point of a shorter travel bike is that it should be lighter.
WAT? not really. Still needs a shock, bearings, and a frame. The shock stroke is reduced, thats about it. Shorter travel bikes TEND to be lighter, but only cause they are built lighter as they tend to be XC whippet bikes, not Huck-to-flat ers.
Its the same reason you dont get 8″ trail bikes, and 12″ bikes never really took off. Technological advancement and the current position of bikes means we are past more-is-better. There is an optimum for a job.
a 4″travel alpine would make a wicked little bruiser for clattering down UK DH tracks (but probably not winning), Jumping, and general trail riding without wanting to be wallowing around on a 160mm chassis, but still being able to give it a battering.
I VERY much doubt it is any lighter, just more “pert” to ride.
Also, FWIW 127mm is 5″. Equally, my Five29 has 140mm rear travel. I Think they’ve got a bit confused over at Orange over which end of the ruler to hold, but the concept of a short travel bruiser is a solid one.