The CM039C is a unique, and possibly best AK variant available. There are two specific features that set this AK apart from its cousins. The 6 position LE stock and the top rail. Never before has an AK variant had an adjustable stock to accommodate different user preferences. The top rail on the CM039C is not simply screwed into the flimsy receiver cover but mounted above it on it's own platform to provide a stable foundation for optics. The genius thing about this rail is the space provided in the middle so is not to block the iron sights. The hand guard rail system is ideal for the included vertical grip, or aftermarket lasers and lights. This AK is rock solid. It looks and does things other AKs cannot because this was made for Contractors, and they don't follow the rules, they make the rules!