I have a brand new VM Hytech Side Charging Upper Receiver with lightened Bolt Carrier that has been notched for the side charger for sale. VM Hytech was the originator of the non-reciprocating charging handle side charging upper receivers. Very rare to find one of these excellent side charging upper receivers, much less in this condition. When American Spirit Arms and Ameetec were still around they both copied the VM Hytech design. $300