WELDMENT, HDD MIL SPEC TRUNION BLOCK/BARREL SUPPORT. THIS TRUNION FITS M249, M249S, MK46, MK48. PART # 9348204.

THESE DROP RIGHT IN AND NEED NO MODIFICATIONS, EASY INSTALL AND LESS ASSEMBLY TIME. GOOD QUALITY STEEL THAT WELDS EASILY AND HEAT TREATS TO A MIL-SPEC LONG LASTING COMPONENT. BARREL FIT IS PRECISE, BARREL LOCKING LEVER DROPS RIGHT IN, GAS TUBE FIT IS PERFECT, FEED COVER AND FEED TRAY DROP RIGHT IN, EJECTION PORT DOOR AXIS PIN HOLE IN THE RIGHT SPOT ETC.  THE BEST AVAILABLE.