I know that any rifle can be made quieter. But, my .22 Standard Vet is the quietest full power rifle I've ever owned, and I shoot it in the yard with close neighbors. Isn't the shroud on the Standard and/or Long longer than your Compact? Maybe an easy replacement.
After messaging Gino, he told me that there are 3 sizes of shrouds for the Veteran: Compact, Standard and Long. Yeah, I suppose I could have gone one size up and added some more baffles, but that kind of defeats the purpose of having a compact bullpup. I initially was looking for a slightly longer, custom shroud 2", would have allowed me to put in two extra baffles.
But last night I had a member contact me about making a custom suppressor which will be only 4.5" long and only weighs less than 2 ounces. It is a 3D printed unit. If that passes muster, I will be posting my thoughts.