This is a rare example of one of the original HK93 semi-automatic rifles that has been converted into a fully automatic, class III/NFA machine gun by Jonathan Ciener. This was an original early pre-ban HK93 rifle that has the standard H&K factory receiver markings on the right side of the magazine well with the serial number "A125893" and "IB" manufacturers code (1981) stamped on the left side. It was converted into a clip and pin lower trigger groups that is clearly marked on the side of the trigger housing with "A125893/JONATHAN ARTHUR CIENER/TITUSVILLE FLA.". It is also marked with "S/F/A" indicting it is "SAFE/SEMI/FULL". It has the standard HK93 drum rear sight graduated from 2-4 (200-400 meters) with a post front sight. It is fitted with an original HK narrow, forend, with the black composition buttstock and pistol grip. It comes with one 20-round factory magazine.