Perfect height for flat top M4. Adjusts well with a pick or any random thin probe found in many field cleaning kits. Too fine to use bullet for adjustments. Easy on, easy off. Stays zeroed 500+ rounds. Was able to perfectly co-witness front and back sights to a red-dot sight. Make sure you don't buy the gas block sight if you have a flat top M4 - buy this one.
Pros: Perfect height for flattop M4 carbine. Stays zeroed.
Cons: Hard to find. Not enough manufactured.
This review was written in the old system and had content requirements that are different than reviews written today.