This listing is only for the Tailhhook adapter and rods. The piece which attaches to the MPX is NOT INCLUDED. The leading product photo is of the product being sold.
Replacement rear end for the Sig arm brace commonlly paired with the MPX. Allows the use of the Gear Head Works Tailhhok pistol arm brace. This model is specific to the MPX as the rails are made to fill the cut outs 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.