Hello again,
I took a look at your mod's graphics resources and was inspired to give them some workover. I'm not Yrizoud or Robin, but you might find these worthy none the less.
So far I've tackled the SAW, smoothened it a bit, and, loosely basing on Minimi, replaced the handle, changed the proportions a bit and added the gas pipe. Two versions: one with closed ammo intake, one with ammo belt visible (I've also changed the default size from 2x3 to 1x3, as SAWs aren't that big, but this can be easily changed back).