I have a Springfield Armory 1911 .45, the Loaded Model. (PX9151LP) Every load that I've tried hits slightly left of where I'm aiming, so I'd like to move the rear sight slightly to the right. It has a fixed low profile combat rear sight that I thought I could slightly drift right. The problem is that there is a set screw in the middle of the rear sight that I cannot find anything to fit to loosen. It is tiny, and very hard to see, but it looks like either an allen screw or a torx - I simply cannot tell what it is, and I've tried everything. The manual does not tell what it is. I called Springfield, and the nice customer service lady told me a size that was obviously much too large. I do not have a gunsmith near where I live, plus this should be a simple matter. Ideas?
