I haven’t seen an Armeson OEG in 20 years at least. Never heard of the Trilux.
Used by the Brits on the L1A1 SLR, particularly in Northern Ireland during the Troubles, and by the Gurkhas on M16A1s. The SUSAT sight used on the current L85A2 SA80 rifkle is a derivitive.
Very robust unit, used a tritiun light source in an inverted reticle that was VERY fast to use- when the rifle jumped upward during recoil, you just brought the pointy reticle back down to the next target and pressed again.
Sort of the original *point and click interface.* The Russian IP29, commonly used on the RPK and RPK74S was a copy.