Purchased to covert the HK rail to a more generic standard. Hard to beat the price to have accessories easily installed. It is a simple plastic guide, but it works. Installed on my HK USP9C in a few seconds and had a light from my shotgun mounted in a few more seconds.
Pros: cost, function and quality
Cons: plastic construction
This review was written in the old system and had content requirements that are different than reviews written today.