it is really bad in GRB on silencer, let's go straight, as its function really bad, ( may be due to new feature of NPC having detection circle ) in the end , it is easily to become a stealth action into open fight situation, so it's so bad on gaming experience, people will be easily forced to kill all NPC in the site, but the original strategic is to stealth . i think the NPC detection circle is a good thing to GRB, a new feature, however, too aggressive in the circle is making the gaming style easily into just a open fire or gun fighting scene, to a player like Spencer or original stealth tactics is hard to perform in this game, i hope there was something can cure this drawback, whenever, i think to solo player, stealth is the first option in doing a mission or any action in a site.