I’ve had several different optics on my SBR, currently it wears one of the green fiber optic ring sights. Partly for nostalgia, and partly for its compact size.
I’ve previously had the following:
Mini ACOG in a TROS mount - great optic in a great mount, but I eventually ditched it for the second choice...
SS black reticle ring sight with red tritium - durable and small, but has the visual feel of looking through a drinking straw. Ditched for the third choice...
Damage Industires top rail with EOTech EXPS3 - huge compared to the others and sat way too high. Ditched for option four...
Original white ring sight with aftermarket illuminator - one of the original sights with a cludge illuminator fixed to it, good optic but temperamental due to the hack nature of the illuminator. Also ditched for option five...
Aimpoint Micro in an ultra low mount, forget the manufacturer - again good optic ina good mount, but it still felt “off” to me. Ditched it for my final solution.
I’ve kept the green fiber optic ring sight for the longest, and it does everything I need my PS90 optic to do. No batteries, works well enough without serious washout, compact size, and looks like it belongs on the gun. My only real complaint is that you can put it in the right set of circumstances that cause both the white ring and the green fiber optic to wash out, but those circumstances are rare for me. I prefer this one to the SS optic due to what I can only call “tube size”... the white ring optics feel like they have a much larger visual extent, and are easier to pick up faster for me.
Every time I think about changing optics again I stop myself and just keep old greeny. It works.