CONVERSION KIT FOR THE MK48A1 MACHINE GUNS TO 5.56X45 NATO. KIT INCLUDES BARREL ASSEMBLY, BOLT, SLIDE, FEED COVER ASSEMBLY, FEED TRAY, HDD MK46A1 FOLDING CHARGING HANDLE ASSEMBLY AND 5.56 EJECTOR BLADE ASSEMBLY.  THESE RUN THE STANDARD M27 LINKS. THIS KIT ONLY FITS THE NEW LONGER RECEIVER MK48A1 7.62 MACHINE GUN.