My hardtail is 21lb.
frame- BeOne Raw Carbon 21″ (1020grams)
Forks- Rock Shox Sid Team
wheels- Hope Pro3 on Crest rims
brakes- Hope X2 Race inc matchmaker clamps
Gears- XT crank, shifters, front and rear mech, Sram 990 cassette and 991 chain
Pedals- Wellgo MG1
Finishing kit- Ritchey Superlogic bars and post wcs stem
Hope headset, QRs and bottom bracket
Charge spoon Ti saddle
ESI chunky grips
Not running tubeless yet and have Continental Mountain Kings which could be changed to go lighter.
Will be changing to 2×10 XT this year XTR is just way too expensive.
Should be able to get to around 20lb without breaking the bank, it’s amazing how changing each component to one that’s 10% lighter adds up.
Just remember there is a point where lighter means it won’t last very long or might not be upto what you’re planning on using it for.