We really like the Aimpoint Micro H-1 Red Dot Sight With Flattop Mount for only $565.00.
AR-specific version of the popular Micro H-1 has an integral, quick-release riser mount, ready to install on any AR-15/M16/M4 flattop rifle. Non-magnifying, parallax-free lenses and an easy-to-acquire 4 MOA red dot combine for one of the fastest, most accurate sighting systems available. Riser aids in comfortable, heads-up aiming, while providing the correct elevation to co-witness with mil-spec “iron” sights. Positions the backup sights in the lower 1/3 of the Micro’s field of view for instant transition to them. Quick-detach LRP (Lever Release Picatinny) mount lets you remove the H-1 from the rifle with a flip of the locking lever and return it without loss of zero. On/off Mfg: Aimpoint SPECS: Aluminum, anodized finish, matte black. 2.4″ (6.1cm) long, 1.6″ (4.1cm) wide, 2.6″ (6.7cm) high, including mount and spacer. 6 oz. (170g) wt. 1x magnification. 4 MOA dot. Battery life: 50,000 hrs on one CR-2032 lithium battery, included.