Another solution is the way I went. The JP Tension pin. You can eliminate the problem with the spring not working with the MIAD and you will have no play between the upper and lower. I just see it as a win/win solution. It does take just a bit longer to take the upper off, but I am never in a hurry to do this, so I am good with it. But, breaking that off in the hole really sucks!!! You will figure it out somehow, it what we do when we hit a problem working on these guns!!! I hope yo get it out of there!