Managed to get my Enduro bike below 30lb, but thats only by getting a carbon frame, and still its only just below.
Carbon Trans Patrol medium (s.deluxe shock)
Xfusion Sweep HLR
Carbon Lite Bicycle 31mm carbon rims, dtswiss DB, pro2
Carbon Renthal fatbars
XTR crank
XT 10s shifter,mech
Praxis cassette
Chromag flat pedals
Thomson 50mm stem
Formula the one brakes
BikeYoke Revive 125mm seatpost
Charge spoon chrome saddle
Spesh butcher/slaughter grid tyres
SRAM drivechain would save a bit of weight. lighter spokes I suppose. Rims are heavy for carbon, but I wanted toughest (still only 440g). Lighter saddle maybe. Not going light on tyres, they would puncture.
29.15lb
Any enduro bike much below 28lb is dubious IMO.