M249, MK46, MK46A1, MK48, MK48A1 AND M249S  M4 TYPE STOCK KIT.  M4 MIL-SPEC CARBINE TUBE, 6 POSITION COLLAPSIBLE. SUPERIOR DESIGN, COMES WITH THE HIGHLY DESIRABLE HYDRAULIC BUFFER, NOT THE OLD '80'S VINTAGE CRAPPY SPRING BUFFER. QUICK DETACH SLING MOUNT AND FAB DEFENSE STOCK.  AVAILABLE IN BLACK, ODG OR FDE, SELECT IN OPTIONS BOX.