My M1A scout rifle came with a .052 front site with a red dot, really nice. However it shoots really low and I have to crank the rear a bunch to hit center at 100 yards. The gun was purchased used (very little) and the site may have been installed by the previous owner. I would like a .062 with the red dot (match site) so I can lower the rear site. Where can I find one of these replacement sites I could not find any where I looked?