Very lite and not very stable. - VISM 30mm Cantilever Scope Mount w/Dual QR Mount

I bought this and when it came in it was much lighter than the Bushnell PEPR model that I previously bought. I mainly got it due to the 45 angle rail.

I changed the 45 mount so that it was on the left side but then the front lever won't close. So I removed the levers and mounted them to close to the rear instead of the front. Unfortunately the locking mechanisms are difficult to engage with the lever rotated. The whole assembly also did not seem to sit very tight. I attempted to tighten the nut on the right side and it stripped.

My guess is that it is soo lite weight because it is made of cheap aluminum. You will pay a lot more but check out the Cantilever mount by Warne that has two 45 mounts.