B&T PRO EXTENDED BOLT RELEASE

Using a punch tool, remove the factory roll pin out and set it aside, slide the factory button off, insert new Extended Button on, drive the roll pin back in. This will conclude the installation.

As a side note, while the factory button is off, you can slide the other part with the shaft out and flip the side, then install the new bolt release and drive the roll pin into place,  depending on which side the extended bolt release preference is .