I know I'm 5 months late to the thread but I had a factory threaded Mk3 and had it suppressed. It didn't take long to get rid of it and buy a Mk4 lite threaded. Those gen 1, 2 and 3s get dirty QUICK. Since 22lr isn't a stout round the action starts to cycle slower rather quickly due to it getting gummed up. The ease of taking the bolt out on the gen4 makes it soooo much simpler to do a quick spray and wipe and relube during a range session.