Perfect fit, easy to install - Burris AR-F3 AR Tactical Flat Top FastFire II & III Mount

the mount fit perfectly on my Ruger SR556 takedown rifle (comes with a pic rail on the rifle). easy to mount, and the sight mounts just as easily to the mount. sighting in was simple- i had already sighted the rifle in using its MBUS sights- raised the MBUS sights, adjusted the red dot while looking through the MBUS sight; loweres the MBUS sights, fired my first round- not only was I on paper, I only needed 2 other shots to be dead on. of course I had to go through another box of ammo, just to "make sure"- since I would need to clean it anyway, why not have some fun.