Here are some variables, they all follow the same pattern though.
And the Trijion version
All the same basic pattern, nothing short and stubby with the look of an ACOG, Aimpoint, etc.
You could also get an Aimpoint, EOTech etc. and combine with a flip to the side magnifier.
The posted links are only examples of the sights, not places I've bought products from by the way, some of these sights can be import or export restriected in their real versions.