I put this optic on my AR. I bought a bore laser sight. I was able to get the left to right, but the vertical I can't seem to get. The adjustment screw just won't turn anymore. Any ideas on how I can get this red dot dialed in?

Which version of the Romeo? And how do you have it mounted? Pics might help.

Is the elevation adjustment dial frozen/broken, or are you just at the end of the elevation adjustment in one direction?

And at what distance are you attempting to bore sight it?

If you're just pointing it at the wall in your house and trying to get the optic dot to match the bore laser dot, you could easily have run out of elevation adjustment. AR optics necessarily have a rather tall height over bore offset (2-3 inches) and aren't conducive to zeroing at extremely close distances of just a few feet.

Many won't mechanically be able to adjust elevation that low, and even if you physically could, you wouldn't want to zero your AR at just a few feet anyway... It'd put you way too high off target at any typical AR rifle shooting distances. (As in several feet above POA.)

So if that's the case, try again at something like 25 or 50 yards. Those are more normal AR zeroing distances.

This does means that at room distances your POA will be a few inches above your POI. It's just the nature of the beast, and something that you'd have to take into account if you need to be able to make ultra precise close quarters AR shots, like aiming at the forehead to punch the bridge of the nose T-box intersection. Otherwise, even with a couple inches of offset, center mass is center mass.

For some odd reason I'm having trouble with my flickr account so no pics. Its a Romeo MSR 1x20 compact red dot. Its mounted on the rail as far forward as possible. Yes, I've only tried with inside my house at about 30 feet.


PXL_20250507_003209985.PORTRAIT by [url=https://www.flickr.com/photos/184375216@N03/][/url], on Flickr

Terribly sorry about the size of this photo. Still having problems with my flickr account. I did select small, but this doesn't look small.

This message has been edited. Last edited by: goose5,

Most people recommend mounting the optic on the receiver. If you’re bore-sighting at 10-yards, expect to have height over bore offset. Your laser should be about 2 inches below where the red dot is aimed.

I’ve never found the need to bore-sight my ARs. I just shoot at 25 yards and am usually just a few inches off then fine tune at 50 or 100.

Mount the optic on the receiver, not the handguard. The handguard can shift, moving your zero.

Just move it back a few slots until it's mounted solely on the receiver alone. Not on the handguard or overlapping onto both the handguard and receiver, but fully on just the forward portion of the upper receiver. Like so:

This message has been edited. Last edited by: RogueJSK,

Once you've moved your optic back a few slots onto the receiver (only), since you have a known 30 foot/10 yard distance indoors, give this a shot.

Print this target on a standard 8.5x11 piece of paper: https://jerkingthetrigger.com/...-200-Zero-Target.pdf

Hang it on the wall at 10 yards.

Line up the bore laser in the center of the bottom gray dot, then adjust your windage and elevation on your optic to match the center of the black dot on top.

This will give you a rough 50 yard zero on your optic. When you get a chance to hit the range, confirm/fine tune with actual rounds at 50 actual yards.

For a quick comparison to show why - even if you could get it to mechanically work - just dialing in a 10 yard zero for your AR is a bad idea, here's the POI difference (approximate, and in round numbers) in rise/fall at various distances on a 10 yard zero versus a 50 yard zero:

10 Yard Zero:
10 yards: 0"
25 yards: +3"
50 yards: +8.5"
100 yards: +18"
150 yards: +26"
200 yards: +33"


50 Yard Zero:
10 yards: -2"
25 yards: -1"
50 yards: 0"
100 yards: +1.5"
150 yards: +1.5"
200 yards: +0.5"

So a 50 yard zero is within an inch or two above/below your aiming point all the way out past 200 yards, and you can simply hold directly on and easily hit your target at any normal ranges for an AR with an unmagnified optic.

Whereas a 10 yard zero is going to be hitting over a foot higher than your aiming point past ~75 yards, and nearing 3 feet high at 200+ yards.

Have not followed recently but Sig Romeo 5 were being faked/cloned. Hopefully you have a genuine version.

quote:

Originally posted by Ace31:
Have not followed recently but Sig Romeo 5 were being faked/cloned. Hopefully you have a genuine version.

Hard to believe someone would fake an $80.00 optic.