Last night I a assembled a lower and I suppose I had my mind on other things while I was doing it. To make a long story short I used the safety detent as the bolt release plunger. I don't know what I was thinking but it just fit right in. It's seems to work ok but it bothers me. Should I change it out? I dread doing that as the roll pin for the bolt release was a real PITA to get in and I'm sure it will be so to take out. Plus I'm afraid of damaging it.