u/JRo713

Put together my first VZ61, and I’m running into an issue. When I attach the upper to the receiver, I can pull the bolt back, pull the trigger, etc. But when I flip it to safe, the bolt catch goes up, and when I take it off safe, it won’t come back down unless I take the upper off and push it down. Did I use the wrong spring or do I need to polish it? Built on a tortort if it matters