Manual and video both show a hole in guide rod to hold the spring compressed using an opened/shaped paperclip.
No such hole in my guiderod--but there is a flat screw slot in the front end of the guide rod. The Armscor support person said that gets unscrewed. She wasn't really clear as to whether that was done under tension or with the spring compressed or what. As stiff as the spring is, I can barely compress it--and I have strong hands.
Anyone with this experience? Clearly the screw is supposed to take the place of the hole/paperclip process, but I am unsure how that goes. Of course there is no mention of same in manual--in fact the Pro Match/bull barrel model isn't in there at all.