AIM-O MRO Red Dot with QD Riser and Low Mount

Buying the right mount height is the part people get wrong, and it is not a small thing. Too low and the sight disappears under a mask or a helmet mount; too high and your cheek comes off the stock to find it. The fix here is that you do not have to choose — a quick-release riser and a low mount both ship with the optic.

The low mount is the one for a rifle with a comb you can get behind properly. The riser lifts the sight to the height that works with a full-face mask or a helmet-mounted anything, and it carries a lever so the whole assembly comes off for transport.

The optic itself is a 25 mm aperture in a short aluminium body, 150 g on its own, with a variable-intensity red dot and multi-coated glass. Eye relief is unlimited, which is the useful property of this pattern — it does not care how far back your head sits.

Spherical lens geometry is the reason the dot stays where it should as your eye moves across the window, rather than drifting towards the edges the way a cheap flat-lens reflex does.

Specifications

Good to know before you buy

Decide the height before you zero, not after. Swapping from the low mount to the riser moves the sight line and the gun will need setting up again.

Two mounts means a spare set of screws and a spare lever rattling about in a drawer. Keep them with the box rather than loose, because the lever is the part you will want in a year.

The 150 g figure is the optic alone. The riser adds to that, so a tall setup on a short gun is more weight out front than the number suggests.

Frequently asked questions

Which mount should I use?
The low one on a rifle where your cheek sits properly on the stock. The riser if you wear a full-face mask or run anything on a helmet, because it brings the sight up to your natural head position.

Is the riser the same height as a night-vision mount?
No. It is a middling riser rather than the tall 2.33 in pattern. If you specifically want that height, our AP Micro high rise mount is the one to look at.

Does unlimited eye relief mean anything in practice?
It means you can mount the sight well forward on a handguard and still see the full window. Tube scopes do not allow that.

Red only, or red and green?
Red only on this one, with variable intensity. The brighter settings cope with open ground and the lowest are for indoors.

Will it survive being shot?
The housing is aluminium and the glass is set back behind the rim, which is the usual protection. A honeycomb grid over the front takes the hit properly if you want to be sure.