# Starter Shoulder Extension Upgrade EN

The Cross-Starter allows you to enhance your Pro/Mag-Starter and increase your comfort while playing, and improve your in-game aim even more precisely than the classic Starter CQB.

[![image.png](https://help.protubevr.com/uploads/images/gallery/2025-04/scaled-1680-/k7Yimage.png)](https://help.protubevr.com/uploads/images/gallery/2025-04/k7Yimage.png) Upgrading to the Cross-Starter should take you 5 minutes.  
For video setup, [you can check our YouTube tutorial Playlists](https://www.youtube.com/channel/UCnrBJ8KQE3-JQrwVBib7J-w).

Make sure you work in a clear area and be very careful, some parts can be easily lost.

<span lang="FR" style="mso-ansi-language: FR;">**<span style="text-decoration: underline;"><span style="color: rgb(230, 126, 35);">\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_</span></span>**</span>

<table border="1" id="bkmrk-insert-the-mag-start-1" style="border-collapse: collapse; width: 100%;"><colgroup><col style="width: 49.9653%;"></col><col style="width: 50.0625%;"></col></colgroup><tbody><tr><td class="align-center" style="vertical-align: middle; border-style: none;">![MagTube_9.png](https://help.protubevr.com/uploads/images/gallery/2025-05/scaled-1680-/magtube-9.png)

</td><td class="align-center" style="vertical-align: middle; border-style: none;">![MagTube_8.png](https://help.protubevr.com/uploads/images/gallery/2025-05/scaled-1680-/bBqmagtube-8.png)

</td></tr><tr><td class="align-center" style="border-style: none;">Insert the Starter’s tube in the stock upgrade’s connector.</td><td class="align-center" style="border-style: none;">Tighten the screw on the connector (not too strong, you do not want to break it).</td></tr></tbody></table>

<table border="1" id="bkmrk-loosen-the-stock%27s-s" style="border-collapse: collapse; width: 100%;"><colgroup><col style="width: 50.0497%;"></col><col style="width: 50.0497%;"></col></colgroup><tbody><tr><td class="align-center" style="border-style: none;">![MagTube_5.png](https://help.protubevr.com/uploads/images/gallery/2025-05/scaled-1680-/magtube-5.png)

</td><td class="align-center" style="border-style: none;">![MagTube_10.png](https://help.protubevr.com/uploads/images/gallery/2025-05/scaled-1680-/Oupmagtube-10.png)

</td></tr><tr><td class="align-center" colspan="2" style="border-style: none;">Loosen the stock's screw and position it in a square (90°) angle with the tube.  
</td></tr></tbody></table>

<table border="1" id="bkmrk-adjust-the-tube-with" style="border-collapse: collapse; width: 100%; height: 197.1px;"><colgroup><col style="width: 50.0497%;"></col><col style="width: 50.0497%;"></col></colgroup><tbody><tr style="height: 116.9px;"><td class="align-center" style="height: 116.9px; vertical-align: middle; border-style: none;">![image.png](https://help.protubevr.com/uploads/images/gallery/2025-04/scaled-1680-/dPbimage.png)

</td><td class="align-center" style="height: 116.9px; vertical-align: middle; border-style: none;">![MagTube_11.png](https://help.protubevr.com/uploads/images/gallery/2025-05/scaled-1680-/magtube-11.png)

</td></tr><tr style="height: 80.2px;"><td class="align-center" style="height: 80.2px; border-style: none;">Adjust the tube with the top of the stock and tighten the screw (arrowed in 3<sup>rd</sup> picture).</td><td class="align-center" style="height: 80.2px; border-style: none;">You can adjust the rear tube and stock to fit your gameplay, and attach the sling.  
*We recommend having the cheek rest parallel to the Starter's tube, but it's up to you*

**Enjoy!**

</td></tr></tbody></table>