You can change the sound of any gun by replacing the WAV file in the gamecore\guns folder, just be aware that updates will restore the original file. Your best bet is to copy and paste a new version of the gun folder in question, then modify the WAV files as you see fit.
PC SPECS: Windows 8.1 Pro 64-bit, Intel Core i7-5930K (PASSMARK:13645), NVIDIA Geforce GTX 980 GPU (PASSMARK:9762) , 32GB RAM
