DBoys - 416 Style Metal Receiver Set - Black, if you want to convert or repair your old Airsoft AEG into a 416 style then this is an ideal starter kit. Designed for the acceptance of a Version 2 gearbox, everything you need to assemble is included. You still need your old hop unit, pistol grip, motor, front end and stock assembly but you have everything else you need in this kit. Included is the upper and lower, magazine release catch ,selector, functional dust cover / bolt release system and retention pins and body pins. There are no trade marks on this receiver set so if you wanted to add your own then you have a blank canvas to work on.