Here are some that I have used/own
Elcan SpecterDR - Beastly optic with SOCOM pedigree, very nice glass, awesome BDC reticle, short eye relief, 1x is more like 1.2x, best for DMR setup IMO.
Leupold MK4 CQT - Heavy and feels sturdy, good glass, dot is a bit large for precise work, 1x is more like 1.1x, ok eye relief, not ideal for bench work but great for a medium range carbine.
Meprolight M21 - Sturdy yet a bit clunky, true 1x reflex sight with no need of batteries but may wash out under strong sun light, easy to use no fuss sight, ideal for pistol carbines/SMGs and shotguns or for short range SHTF carbines.
Kobra EKP-8-02 - Cool and very under valued red dot sight, has 4 useful reticles to choose from, battery life is a bit short, meant to be used on Combloc platforms.
EOTech 552 - Your gold standard in holographic sights, best reticle there is IMO, great optic for CQB and the 1 MOA dot can be quite precise, best used in conjunction with a magnifier to make it really shine.
Aimpoint T1 - Perhaps the best red dot sight ever made, small/light and can be mounted really low, 5 years battery life, very durable and is IMO the best optic for any purpose.