Out of spec, shady, poor customer service - Guntec Usa Guntec Low Profile Gas Block Clamp On Steel

The gas tube doesn't fit tightly into these gas blocks. When you tighten the 2 bolts the body of the gas block bends downward and starts to scrape off the finish of the bolts. Returned this to Guntec after they told me I could pick out something else. Well, they didn't do that, they mailed me another one, this time it was a set screw style gas block. They decide what the customer wants...... Never seeen that before from any company. If I wanted a set screw gas type block I would've bought one. Folks buy clamp style gas blocks because they don't want to damage their barrels. They stopped responding to my emails. Low quality finish, poorly designed, not made in the USA.