Replace a 507C ACSS with the subject RDS. Before I did so I sighted over the sight base and the ACSS chevron was sitting right at the top of the front sight. I can't get close to that with the COMP and, yes, the sight bases are identical thickness. Anyone have out-of-adjustment issues with any of that configuration Holosun? (507C and the like)
If you haven't shot it yet, consider that the larger glass probably requires a different mounting angle of the emitter - and you're probably zero'd lower than you think.Originally Posted by rdtompki
I have put a 507 Comp on a Glock 47 and a SA Echelon, and both installations took almost no adjustment from how the optic came out of the box. What is the Comp installed on and with what, if any, plate?
Likes pretty much everything in every caliber.
The only adjustment issue I’ve had across nearly 20 hollow sun optics was a 407K installed on a SIG P322 which ran out of windage adjustment.
Long story short, there was nothing wrong with the optic. It was an installation error. There was enough play in the mount that the optic was installed canted to one side.
In this case, remember the 507 comp has a larger window and for practical purposes, red dot pistol optics are Parallex free.
It sounds like you went from having a small window optic, which provided a true co-witness to a large window optic, which is now providing a lower third or lower quarter co-witness.
Assuming your irons are zeroed, to check co-witness you need to ignore the dot, get a proper sight picture with irons and only then note where the dot is in relation to your irons sight picture.
Heading to the range this am. Essentially, I was using the front sight and sight base as "irons" which aligned with the dot on the previous RDS. The COMP wasn't close and I verified with my boresight laser. FWIW, I get parallax; first head-up display I worked on was in 1976 or so; think RDS with a 4" eye box. I'll report back.
Good news: the screws were perhaps one thread pitch too long which contributed to the issue
Bad News: Yes, I can hit a 12" plate at 20 yards, but I'm at the adjustment limit. Sight will probably have to go back to Holosun, but I'm going to reassess tomorrow.
What pistol, what plate, what direction off?
Likes pretty much everything in every caliber.
Pistol: Kimber HD Pro Carry II
Plate: still working that. I've had 4 various handguns milled from plates and I can't find the email thread for that particular gun
Direction Off: Hitting low and at limit of adjustment
No problem mounting the 507C (ACSS) and achieving a good POI.
I have somewhere in my memory, that a 1911/2011 requires a slant up for the plate. See the Kimber description:
https://store.kimberamerica.com/optic-plate-vortex
Likes pretty much everything in every caliber.
I posted this in your duplicate thread the other day.
It's a common thing to happen with 2011s and revolvers.
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