Summary

-Resize the screw to grip the stock groove

-Fill the hollow screw up for better structural strength (no idea why it was hollow in the first place)

fixed with Cura

Print Settings

Rafts:

No

                                            <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>Yes</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>0.2</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>100%</p></div></p>

Better Buttstock screw