My only complaint is they only have magwell inserts for the new Ruger, American Ruger and Glock mags. My pistol is the older Ruger mags. They feed, but the mag falls out if not held in place. Frustrating because the idea is a system of a pistol and carbine that shares mags. Searching online is bizarre, as there are very few mentions of this issue. I'm sure I'm not the only person who was excited for the new version to complete the system.