This product available at JK Army really has a long name, the C&C Tac Steel Short Bolt Set with M1913 Rail Folding Stock Adapter For Marui TM M4 MWS GBBR. This item has funtional Semi/Auto Sear with a Short Stroke BCG for better gas efficiency. This comes with an M1913 Picatinny Rail Stock Adapter For MCX / MPX - Style Folding Stock.
Set Includes: