I had this issue in a match where half way through the sound on my primary gun the AK. Just stopped working. My pistol still made a sound, just not the AK. It never came back again during that match. I'm getting a steady 60 FPS on my GTX 1080 SC with a Ryzen 5 2600 with 16gb DDR4 ram. High settings. But, I get micro stutters often.