Complex sentence: In all about 500,000 units were produced, including the hand chiseled engraved Renaissance and the Lightweight version which utilized a 6061 T6 aluminum receiver-which was developed and produced in commemoration of the Concorde supersonic jet circa 1965.
Split into simpler sentences: In all about 500,000 units were produced, including the hand chiseled engraved "Renaissance" and the "Lightweight" version which utilized a 6061 T6 aluminum receiver. The later unit was developed and produced in commemoration of the Concorde supersonic jet circa 1965.