when I play I cant see my gun (sometimes), so I cant use my scope and I see only crosshair. I cant even see enemy players and I see just running guns. Or I see just legs or body without head. Its really hard to play for me. Any solution ? And all of those problems Change during playtime. It can occur all at the same time or just one. And the weirdest thing is that sometimes I can see my gun but when I throw grenade my gun dissappear.
It might be a Texture bug, under Graphics click Default and Apply .. then make whatever changes you deem necessary. I've had a similar disappearing gun and attachment issue, the above corrected the problem.
Then Graphics / Default and Apply and leave the Textures settings alone. If a pure Graphics and Default fails to resolve the issues then try a Repair.
Now if your GPU has less than 6 GB of VRAM and system has less than 16 GB of RAM then that's a possibility.
What's your system specs? (CPU, GPU, and RAM, OS)