Lego Portal Rocket Turret

You can find the instructions on my other post, here. https://www.instructables.com/id/Lego-Portal-GLaDOS-Frame/
Sorry if this is just a useless instructable, it is because I don’t think it is obvious that there is a rocket turret in the linked instructable.
Thanks!

Note: this design has been updated!
https://www.instructables.com/Lego-Portal-Rocket-Turret-V2/

See other post.