The ICM is a great accessory that I recommend for any HK enthusiast. It installs quickly easily and works perfectly on my rifle. It brings the line of sight up to make the use of a scope much more viable. The ability to move the cheek mount to the bottom of the stock for use of iron sights or as a clubfoot is a very handy feature. The strong design and ease of install makes this a much needed product for the HK platform.