NEW HDD MK46S AND MK48S BOLT  HOLD OPEN DEVICE. LOCK OPEN THE CLOSED BOLT SEMI SO YOU CAN DO BARREL SWAPS, RELOAD, CLEA…

NEW HDD MK46S AND MK48S SEMI AUTO TRIGGER ASSEMBLY.

NEW HDD MK46S AND MK48S SEMI SEAR. ALSO FITS THE M249S.

NEW HDD MK46S SEMI BOLT ASSEMBLY.    THESE ALSO FIT THE FN M249S.

NEW HDD MK46S SEMI FIRING PIN AND SPRING ASSEMBLY. THESE DO NOT FIT A M249S.

NEW MK46S SEMI AUTO 5.56X45 BELT FED RECEIVER ASSEMBLY, READY FOR YOUR BUILD. THIS IS A CLOSED BOLT SEMI AUTO RECEIVER W…

NEW HDD MK46S 5.56 SEMI SLIDE HAMMER. THESE ARE A NEW SUPERIOR DESIGN AND DO NOT FIT A M249S.

M249, M249S, MK46 AND MK48 FRONT SIGHT ADJUSTMENT TOOL. FOR STANDARD FRONT SIGHTS.