[rtkwe]

I'm not seeing anything about a built in sound suppressor just a flash suppressor which is a fairly common feature on modern assault rifles and their civilian variants. You don't generally build in a suppressor because they're technically wear items as the hot gases will slowly erode the baffles over time. That plus their extra weight and cost meant most militaries only issued them to units that were built for stealth missions in the past.

[Sharlin]

Ah, when you said "suppressor" I thought you meant "flash suppressor" but rereading I realize you meant "sound suppressor" like the GP.