AR-15 / M4 Mil-Spec Steel Lower Receiver End Plate

The end plate is the small but critical spacer that sits between the buffer-tube (receiver extension) and the castle nut on any carbine-stocked AR-15 or M4.

• Captures the takedown-pin detent spring in its rear channel.

• Provides a solid shoulder for staking the castle nut, preventing the tube from backing out under recoil.

• Fits all mil-spec and commercial-diameter carbine receiver extensions and lowers.