Same issue here. I found another user who was posting about this, I put my info and screenshots there. Im on an Intel i7 4770K and running an AMD card RX Vega 64.
So it looks like its AMD related, maybe a driver issue.
https://forums.fatsharkgames.com/t/graphics-artifacts-around-weapons/61610
and another one I found with the same issue:
And one more - amd user as well:
https://forums.fatsharkgames.com/t/visual-anomaly-on-outdoor-level/61930
and:
https://forums.fatsharkgames.com/t/graphical-artifacting-near-weapons/61411