Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: WILL NOT TIGHTEN
Review: THESE MOUNTS WILL NOT TIGHTEN ENOUTH TO KEEP THE SCOPE FROM MOVING. I USED A SHIM AROUND THE BARREL, BUT WHEN I MOUNTED THE SCOPE ON WITH THE SCOPE RINGS IT LET THE MOUNT MOVE UP AND DOWN THE BARREL.THIS IS A BAD DESIGN BECAUSE THE CLAMPS WORK AGAINST EACH OTHER.
