I just put the Sightron S33-4R on my A2 Carbine. (I have pix, but unable to post them). I was curious about what experience people have had with this optic.
To me, it seem like a decent optic. It has four recticle pattern options, 11 position rheostat (No. 11 is way too bright for most applications). Haven't shot it yet, but it looks good. Mounted it over the handguard with a gooseneck carry handle mount.