Attach an object (weld) on 2 points

Hi there,

I'm trying to figure out how to attach an object to a model based on 2 points, to be more specific, I have a rifle and I want to be fastened to both hands of the player model (like on Onwards VR).

I was thinking on attach the first point by setting its position, then use LookAt to match the second point, but probably there's a better way.

Thanks in advance.