Replacement rear end for the Sig arm brace commonly paired with the MPX/MCX/Rattler. Allows for the use of the Gear Head Works Tailhook pistol brace. This model can be used on the MCX/Rattler and MPX platforms. Although on the MPX the rods will not fill the cutouts present on the upper receiver.
“Tailhook” option is to add a Gear Head Works TailHook Brace to the order. Selecting “NO Tailhook” is for customers who just want the TailHook adapter without the Brace.