Pistol RDS on carbine, elevation range?

gloom

gloom

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I haven't had a chance to try to zero this yet, so I'm wondering in advance if the elevation has enough range to adjust to a 25-yard zero while being at 1/3 co-witness height on an AR-15. It's about 1.63" above the rail, so about 2.88" above the bore. The red dot is a Holosun 507C. I'm planning to use it with a .22LR conversion kit. Just checking if anyone has had experience with this setup before I waste my time or break something. (I have a rifle red dot, but it's being used elsewhere, and I like the reticle on the pistol red dot. I like the reticle more on a rifle than on a pistol.)

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I also like a the reticle better for a carbine.

I used one on an 11.5” lightweight 556 and it has performed well. But I used a 200 yard zero. Sorry, not much help with 25.

But should take seconds to confirm by visually doing a bore sighting.
 
I have a Romeo 5 on an Extar 9mm that is at least that tall and is zeroed at 25yds. No issues. It seems to hit fine at 25 and 100. 200 is doable with some holdover.

I haven't examined it's POI at any other range because....it's an Extar...
 
I've got a $99 Riton on a 9mm PCC zeroed at maybe 15 yards. It's fine.
 
I have a holosun 507 mounted on top of an ACOG, that's also on a spacer, so it's even higher than 2.26 CL. No issues with zeroing at 50 what that extreme mechanical offset.
 
Cole_McD said:
I have a holosun 507 mounted on top of an ACOG, that's also on a spacer, so it's even higher than 2.26 CL. No issues with zeroing at 50 what that extreme mechanical offset.
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Okay, if that works then my setup will work! Thanks! I did consider trying the 507 on top of a scope, but I also wanted to reduce the weight. Also considered a 45* offset mount, but it might be irritating if it doesn't center over the bore. So I ended up with a 0.83" riser.
 
NKD said:
I also like a the reticle better for a carbine.

I used one on an 11.5” lightweight 556 and it has performed well. But I used a 200 yard zero. Sorry, not much help with 25.

But should take seconds to confirm by visually doing a bore sighting.
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Ah, thanks for mentioning bore sighting. That will save some ammo!
 
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Yeah you should be golden!

A nice lightweight carbine is so nice.

On my scoped rifle, I tried a 45 offset for a while, it wasn't my favorite personally. Doesn't help that the rifle I had it on has a Nox muzzle device that gave it a goofy recoil impulse when canted. Top mounted ended up being the move for me, but ymmv.
 
Frack N Cylons said:
I have a Romeo 5 on an Extar 9mm that is at least that tall and is zeroed at 25yds. No issues. It seems to hit fine at 25 and 100. 200 is doable with some holdover.

I haven't examined it's POI at any other range because....it's an Extar...
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An Extar is what is tying up my rifle red dot! I love that thing!

I used the Holosun low mount and a 0.5" riser since the pic rail is already elevated. It does have an issue with the red dot being physically out of alignment with the backup sights though. I wanted a lower 1/3 co-witness, but the front sight is off to one side a bit when the dot is centered. The irons and red dot work fine separately though.
 
I have an HS407CO X2 (the 8MOA ring) on my AR-V since I am trying to keep it as light as possible. Plenty of adjustment range left with a 25 yard zero. One of the house guns, and I absolutely love the setup.
 
Supermatch said:
I have an HS407CO X2 (the 8MOA ring) on my AR-V since I am trying to keep it as light as possible. Plenty of adjustment range left with a 25 yard zero. One of the house guns, and I absolutely love the setup.
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Good to know! The 8 MOA circle seems like it would work better for me. The chevron just draws my focus to the point making it harder to target focus, and a 2 MOA dot is too small for me in some cases.

I was also looking at the AR-V a while back. Seems pretty nice.
 
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gloom said:
Good to know! The 8 MOA circle seems like it would work better for me. The chevron just draws my focus to the point making it harder to target focus, and a 2 MOA dot is too small for me in some cases.

I was also looking at the AR-V a while back. Seems pretty nice.
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Even with my astigmatism, the donut stays nice and clear, and I can see it clearly even weary-eyed. My AR-V had major issues out of the gate, but they rectified that with new bolt/BCG.
 
Supermatch said:
Even with my astigmatism, the donut stays nice and clear, and I can see it clearly even weary-eyed. My AR-V had major issues out of the gate, but they rectified that with new bolt/BCG.
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Nice. I heard that prism optics also work with astigmatism.

Was the AR-V part just defective or did they change the design?
 
gloom said:
Nice. I heard that prism optics also work with astigmatism.

Was the AR-V part just defective or did they change the design?
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Just defective and was getting worse with round count. It would FTE constantly resulting in a stuck case being jammed up against the feed round. I think I only had FTF after they sent it back, and it just hung up on the feed ramp which I've since polished.
 
Supermatch said:
Just defective and was getting worse with round count. It would FTE constantly resulting in a stuck case being jammed up against the feed round. I think I only had FTF after they sent it back, and it just hung up on the feed ramp which I've since polished.
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Glad that it worked out. Do you know if it feeds hollow points?
 
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