I read somewhere that Gen 4 are not suppressor friendly due to the new double recoil spring? Or did I read false information? I cant have suppressor in NY but a friend in Pittsburgh slapped a suppressor onto a threaded barrel and put it in his FDE G19. I wasnt sure if that was a good idea or not? Does he need to replace the recoil spring or do anything else? Wanna kill these ads? We can help!