The Sig Romeo Zero uses the Shield RMSc footprint. So unfortunately these Arisaka Defense Offset Optic Plates will not fit that optic.
You will want to use one of the Aimpoint T1 models:
"Fit: Aimpoint Micro T1/T2 and clones"
The Vortex Defender CCW uses the RMSc footprint, The Defender ST and Defender XL use the Deltapoint Pro footprint. All 3 options will be compatible with model MPN:OOM-P4 and MPN:OOM-P10.
The Arisaka Defense Offset Optic Plates models MPN:OOM-P4 and MPN:OOM-P10 will be compatible with the EPS Carry. However, slight modification to the plate would be required. You would need to remove the rear recoil lug by milling or filing it down and shorten the front lug. At that point, you will be able to install your EPS carry.
The correct Arisaka Defense Offset Optic Plate for a Holosun 507K would be the Deltapoint Pro plate (MPN:OOM-P10). However, it will require modification. You will need to remove the rear recoil lugs on the plate and shorten the front two lugs in order for the 507K to properly fit.
Yes, the Arisaka Defense Offset Optic Plate designed to fit the Trijicon RMR or Holosun 507 will be compatible with the Primary Arms Classic Series 24mm Mini Reflex Sight.
The Arisaka Defense Offset Picatinny Adapter at the link below could be used with the Holosun 510C. But there is not a Arisaka Defense Offset Optic Plate that will fit that red dot.
https://www.opticsplanet.com/arisaka-defense-offset-picatinny-adapter.html
There is not an Arisaka Defense Offset Optic Plates that will fit the Holosun 510C. The Holosun 510C can only mount to picatinny rail using the QD mount.
Yes. The Sig Sauer Romeo 1 Pro uses the Leupold DeltaPoint Pro optic mounting footprint, so the Arisaka Defense Offset Optic Plate (MPN:OOM-P10/MPN:OOM-P4) will fit.
The Holosun HE407C uses the RMR footprint. So the Arisaka Defense Offset Optic Plates that fit the Holosun HE507C and Trijicon RMR will also fit the Holosun HE407C.