I bought the integrated handlebar here
35.34£ |Manillar de fibra de carbono mate UD para bicicleta de montaña, barra y vástago integrados, ángulos de 2 grados, envío gratis, nuevo|Manillar de bicicleta| - AliExpress
I have been with it for more than 500kms with a lot of technical trails and downhill and it is perfect, although I must sayit is more rigid than a normal aluminum one and therefore more uncomfortable. But coupled with the lightweight wheel it gives tremendous agility and steering precision. If you are looking for comfort for very stony areas maybe it is not ideal.
Anyway on any bike or motorcycle where the weight reduction is most notable is on the wheels for three reasons:
1) because they are the parts furthest away from the center of gravity
2) because they are what we must spin, accelerate and they directly affect agility, stability, braking, suspension operation and cornering
3) because they are non-suspended elements that directly affect suspension performance
In my case, the two wheels with a 36mm outer / 30mm inner rim width they weight 1360g. In addition, I have left the original 2.4 front tire, which is perfect for me and it has not given me a scare both in very dry and sandy terrain and in humid forest (but not muddy). At the back I have mounted a resistant tire but of 2,3 and 960gr.
The other components I have replaced are very light: carbon saddle weighs 133 grams, Shimano XTR cassette 367gr. In total between wheels and components I have reduced about 750gr from the original M10 size L