[icaris]

Can not say for sure but it does look like the caps screw off so I think its safe to say it is adjustable.

With that said, i have owned many Huang optics and although they are adjustable, if they arnt near-zero right from the get-go, you probably wont be able to adjust it enough to get it zerod anyway.

Huang is a great retalier, while he doesnt know everything about his products, i have drove all the way from Kingston to his store and he allowed me to bring my gun in to make sure pieces fit(mag release, iron sights, etc.).

I highly recommend the shock-proof Aimpoint clone Huang sells. It is the latest addition to my optics, all of which are from Huang and it is by far the best one ive gotten yet, love it.