Does anyone know if Nelson Custom Guns ever built Supermatches with SA parts other than Receiver and wood? SA says Nelson built my Supermatch in 10/95 but IBA shot record states they put a new GI bolt in and Unitized the Gas cylinder in 04/98. My "86" model SM built by Glen also has a TRW bolt and screw and glue gas cylinder. Just wondering why they would have replaced these parts. When did SA start manufacturing their own bolts and gas cylinders? Just trying to clear up the mystery. Anybody got a theory?