AR15 M4 Upper Parts Kit
AR15 M4 Upper Parts Kit, This Upper Receiver Parts Kit contains the small parts you need to assemble a MIL-SPEC stripped upper. Each kit contains a standard ejection port cover assembly and forward assist assembly with appropriate pins and springs. Includes: Forward assist Forward assist spring Forward Assist Retaining pin Ejection Port Cover Door Ejection Port Cover Spring Ejection Port Cover C-Clips