New favorite - JE Machine Tech Match-Grade Fixed/Detachable A2 Rear Iron Sight

I want to give this a bad review just to keep the price down but I can't do it. This thing is great! I was building a flat top with a fsb and wanted a traditional look minus the handle. Mounting was perfect and has stayed tight with only thumb torque. Adjustments are solid and it stays zeroed. Good flat finish so there's not a bunch of reflection or glare. If you don't need a flip up or low profile this is a great sight to have and can't be beat for the money.