(c) Uses any contrivance or device for suppressing the noise of any firearm unless the suppressor is legally registered and possessed in accordance with federal law, is guilty of a gross misdemeanor punishable under chapter 9A.20 RCW. I understand that currently hunting with silencers aren't legal but what about concealed carry? The laws are very vague and I can't find a straight answer anywhere.. is it legal to carry a surpressor attached to my gun yes or no? Please help me I'm relatively new to all these laws and am just trying to fully understand everything. thanks guys!