Mounted the Warcomp 556 today. Fit and finish were very good. It went on easy. I was impressed with the easy of timing with included shims. I also liked the fact an installation tool,lock tight and shims were included. The instructions were clear and concise. The Warcomp may seem a little pricey but with everything include in my opinion it's worth it. It performs as advertised, I will use on my next build.Thank you for a great product.