When I first saw CMMG's Guard .45 rotary bolt AR I was impressed. It looked like a clever way around the .45 blowback ARs heavy buffer, spring and bcg and the resulting recoil and forward momentum you have to deal with. But I have been unable to find one to handle so I've decided to build myself...

So working on a pre 580 series. With rear sight adjusted all the way up, rifle still shoots more than 2ft. Low at 100yds. Can someone here measure their sight from top of barrel to top of sight for me? I know just file the front down, but I would like to see what the sight heigth is on a rifle...