Whenever I'm using a two handed weapon like a rife or something, every so often it's like the characters arms swing upwards and the gun disappears. Walking a few steps seems to fix it but it's kind of annoying. Doesn't seem to happen with single handed weapons though.

I have it happen too.

Still no reply?

It happens to me all the time. I don't notice it anymore. What's more painful is whenever there is a slowmo on a companion's kill, my character comes out of it pointing in the direction of the kill. So if I'm moving to the west with my scope on a target and my companion kills something east of me, my target is lost and I'm now magically moving towards the east.