Ok, I have everything I need to rivet the trigger guard onto the receiver. I am going to rivet this first before the front trunnion. Before I begin this weekend, Is there anything I have to do to the rivets? How long should they be before I squeeze them? I am using a set of rivets from Copes. It came with 5 longer rivets, 2 alittle shorter rivets, 4 swell necks, and 2 for the rear trunnion.