IDK but for me, the t-90 guns, which are heavy 12.7mm MGs make a really silent sound compared to many other machine guns like the mg42 and overall I find it kind of less intimidating without a heavy oomph in the sound. Also, sometimes I don't here a sound at all. I enjoy using t-90s like pumas, but I was just wondering how difficult it would be to add a different MG sound for the t-90. Thx