Barry Dueck, head of SureFire’s Suppressor program, nationally ranked 3-Gun competition shooter and former Marine developed the Rapid Transition Sight for the competitive or combat shooter who prefers separate sighting systems for near and far targets. See more at http://dueckdefense.com
Ace 3-gun competitor Barry Duke demos combo of 1.5-5X top-mount optic with side-mounted iron sights for 3-gun AR carbines. The Duke defense iron sights allow fast transitions from magnified view for far targets to a 1:1 view of close targets. Barry finds this set-up very fast and the iron sights are “dead-nuts” reliable in all situations.