The CMR/Revolution is a new model in the Patriot Ordnance Factory line of firearms. With the help of customer feedback and our own internal testing we have discovered that the orientation of the extractor spring is important to the functioning/cycling of the weapon. If you experience jams and ejection failures, especially after cleaning the bolt, then you should re-check the orientation of the spring in the extractor. The extractor spring has a small end and a large end. If the small end of the spring is placed into the pocket then the spring can work loose and either sit at an angle or completely come out of the pocket. The result is malfunctioning in extraction and feeding.