The ESF end plate is designed to accommodate rear-facing sockets and allows for the use of stackable castle nuts while letting the carbine stock fully collapse.
It features side and rear-facing QD sling swivel sockets with a billet 4140 steel construction, available in DLC Black or FDE Cerakote finishes.
Installation may require a 2 lug castle nut wrench due to the design potentially blocking access to wrench notches when using a conventional wrench.