Simple to use and the finish is amazing. - Troy HK Top Mounted Fixed Iron Sight

I bought this to go with an M16A2 style carry handle, perfect match. The machining is amazing. The finish is very high quality. I went ahead an ordered the rear BattleSight just to have around. I was hesitant about buying from Troy due to the price. But I must say you get what you pay for with this company. it's nice they have instructions on adjusting to front sight for longer ranges. (3 clicks for this range, etc..)

Anyhow, point is, I love it. I'd go for Tritium sights, but eh, the cost and lifespan has always kept me away for tritium sights. I put on a good green laser and light. But each to his own there.