Works ok, just don't over tighten. - Ergo Grip Polymer Rail Mounting Platforms

I was looking for an inexpensive section of rail to put on my handguard until I get a free float, this was one of the cheapest I could find. When I put it on one bolt didn't feel like it was getting quite snug, by the time I stopped and looked the head had pulled almost completely through the polymer rail. Spend the couple extra dollars for aluminum rail.