The TM-22 is fully machined from a billet of 6061 aluminum. An integral rail was added to accommodate a wide variety of mounting hardware. There is slop taken up in some areas to aid in reliability and helps keep the receiver feel smooth over the years. We have also added a cleaning rod guide to allow for ease of cleaning the TM-22. All you have to do is remove the stock retention screw and bolt group and you can clean your rifle.