When player is erect or crouching sway looks natural, but in prone position if project on real life all weapons weight goes on the ground, player doesn't hold it anymore. But now when you're in prone and sway still present, maybe a bit less than in erect/crouching, but still it's a bit too much. Especially for sniper rifles, it is still too big. On the ground sway should be minimal or not present at all as you don't carry the weight anymore. Or if you plan to bring back bipod system that would work too.

I know that this is maybe artificial for balancing as weapons in prone would be railguns, yes, but it is how it should be, and railguns goes only for sway, definitely not for recoil.

Right now it feels like when you in prone, you, instead of putting weapons on the ground to loose weight, you lift it up intentionally (while in prone), so it's still swaying, and in the same time you still try to hold your breath to stop it from swaying - that doesn't look natural.

Or ofc maybe I don't understand the plan behind it, and the player is Schwarzenegger in his prime, but still with shaky hands in prone somehow. Or there is constant earthquake when you in prone, who knows.
Anyway, this is just a feedback. Minor problem, but would be nice to have it regulated properly.

By the way, there's very nice script in one of the weaponpacks that adds built in bipod for some weapons with deploy/fold animation, so when you deploy it and in prone (measures the distance between point in memory of bipod and ground) recoil switches to more mild one. That looks very nice as finally bipod has some actual use.