NEW MK46, M249, M249S OR MK48 50% WELDMENT. COMES WITH GAS TUBE SUPPORT AND TRUNION WELDED INTO PLACE. THESE ARE THE MOST CRITICAL AREAS TO GET EXACTLY RIGHT ON A M249, M249S, MK46 OR MK48 BUILD. THESE ARE EASY TO FINISH OFF WITH REAR BRIDGE, TRIGGER FRAME SUPPORT, BOLT RAILS AND FRONT TRIPOD MOUNT TO BE INSTALLED.  WELDS ARE OFF THE GUN, YOU CAN POLISH AFTER ALL WELDING IS FINISHED. (210-50)