I got a few of these with my last order so I and a couple gun nuts could test them out they are really quite nice. Right away you can tell that they are made of a polymer with a high glass content, I'm quite impressed. They are also quite beefy but also more expensive. It locks down very tight with no apparent play.
Here are some pics so you can see for yourself how it goes together.
Here are some pics so you can see for yourself how it goes together.












