Description
This Apex Optic Mount is built for the Sig Sauer P320 platform, specifically for slides with the factory R2 cut. It gives you a rock-solid mounting solution for closed-emitter optics on your P320 Legion, M17, M18, or any other P320 model using that slide cut. At $65, this is a straightforward upgrade that keeps your dot secure and your setup practical.
Two versions are available: with or without an integrated rear sight. The version with the integrated rear sight places that sight in front of the optic. This is not just a backup sight—it also functions as a gas shield. It keeps carbon, debris, and firing residue off your optic lens, meaning less downtime cleaning glass and more time focusing on your target. If you run a suppressor or shoot high-round-count sessions, this feature alone is worth the choice.
Co-witness is handled cleanly. The integrated rear sight is set to co-witness in the bottom 25% of the optic window. This keeps your dot field clear while still giving you a solid iron sight backup. You will need a tall front sight to complete the co-witness. We offer two different sight height packages—pick the one that matches your barrel length for proper alignment.
Optic compatibility is straightforward:
- Aimpoint ACRO P-1 & P-2
- Steiner MPS
- Lead & Steel Pandora PB-3
These are all full-size closed-emitter optics built for duty use, concealed carry, and hunting in adverse conditions. The mount locks them down tight to your P320 slide.
Specs and fitment notes:
- Designed for Sig Sauer P320 slides with the R2 slide cut (factory cut for ACRO-style optics)
- Works with models equipped with the factory Loaded Chamber Indicator—no modifications needed
- For the version with integrated rear sight: sights are regulated for POA=POI at 15 yards using 124 grain NATO ammunition
- Installation uses standard mounting hardware—no special tools required
Why this mount makes sense for your setup: If you carry a P320 for concealed carry or duty, or you shoot it in competition or hunting, you want an optic mount that does not shift or loosen. The Apex mount is machined to tight tolerances and fits the R2 cut without shims or adapters. The gas shield feature on the rear-sight version is a real
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