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SIG P320 Red Dot Sights | Trijicon, Holosun & Vortex Optics
If you own a SIG SAUER P320, you already know how capable it is — but the right red dot sight can push its performance even further. Whether you’re upgrading your optics-ready P320 or starting fresh with a mounting plate, adding a quality red dot helps you acquire targets faster, shoot with greater accuracy, and stay confident under pressure.
At Mounts Plus, we carry the top SIG P320 red dot sights and mounts from trusted brands like Trijicon, Holosun, and Vortex. Each optic in our collection is designed to fit your P320 securely, withstand recoil, and hold zero through thousands of rounds.
Why Add a Red Dot to Your SIG P320
The modern P320 platform was built with optics in mind. Many models, including the P320 XCarry, XCompact, and X5 Legion, feature optics-ready slides that make mounting a red dot simple and secure.
Here’s why upgrading is worth it:
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Faster Target Acquisition: Get on target instantly and stay there.
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Improved Accuracy: The single focal plane helps you shoot with both eyes open.
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Low-Light Advantage: A crisp, illuminated dot stands out when iron sights can’t.
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Better Follow-Up Shots: Reduced sight alignment time between shots.
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Confidence Under Stress: A stable dot helps you focus on the target, not your sights.
It’s one of the most impactful upgrades you can make to your P320 — and the results speak for themselves.
Top Red Dot Sights for the SIG P320
We’ve curated optics that perfectly match the SIG P320 platform for reliability, ease of mounting, and proven performance in real-world conditions.
1. Trijicon RMR Type 2
The Trijicon RMR Type 2 is built for duty, defense, and competitive shooters who demand ruggedness and precision. It’s a favorite among professionals who rely on their optics in extreme conditions.
Highlights:
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Legendary durability with forged aluminum housing.
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Adjustable 3.25 MOA or 6.5 MOA dots.
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Long battery life with automatic brightness.
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Works perfectly with P320 RMR plates and slides.
Perfect for: Duty use, competition shooters, and anyone who wants a lifetime optic.
2. Holosun 507C X2
For unbeatable value, the Holosun 507C X2 delivers advanced features at a fraction of the price. Its solar failsafe system, multi-reticle display, and Shake Awake technology make it a go-to for both defensive and competition pistols.
Highlights:
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2 MOA dot, 32 MOA circle, or circle-dot reticle.
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Solar charging backup and motion activation.
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Built-in RMR footprint fits most P320 optics-ready slides.
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Titanium body for lightweight strength.
Perfect for: Everyday carry and range use with maximum feature density.
3. Vortex Venom Red Dot
The Vortex Venom is simple, durable, and backed by Vortex’s unbeatable lifetime warranty. With an ultra-clear lens and quick-access battery compartment, it’s one of the easiest optics to live with on your SIG P320.
Highlights:
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3 or 6 MOA dot options.
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Top-loading battery compartment.
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Multi-coated glass for crisp clarity.
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Compact profile ideal for concealed carry models.
Perfect for: Shooters who want no-fuss performance and warranty-backed confidence.
SIG P320 Red Dot Mounting and Compatibility
Many P320 variants are optics-ready, but compatibility can depend on the model and optic footprint.
| P320 Model | Optic Compatibility | Notes |
|---|---|---|
| P320 XCarry / XCompact | RMR / DPP / Holosun | Factory-cut optics-ready slides. |
| P320 X5 Legion | RMR / Romeo1Pro / DPP | Direct mount or adapter plate. |
| P320 Full-Size | Varies | Use adapter plate for RMR or Holosun. |
| P320 Carry | RMR / DPP | Fits with adapter plate. |
| P320 M18 / M17 | Leupold DPP, Romeo1Pro | MIL-SPEC slide cuts. |
If your P320 isn’t optics-ready, we offer a range of red dot mounting plates to match your optic footprint and slide type.
Best Practices for Mounting a Red Dot on a SIG P320
Installing a red dot isn’t difficult, but precision matters.
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Ensure your firearm is unloaded and safe.
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Clean the slide and mounting area thoroughly.
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Apply a small amount of thread locker to the screws.
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Torque to manufacturer specs (typically 10–15 in-lbs).
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Confirm zero and test alignment at the range.
Take your time with alignment and you’ll get consistent, repeatable results every time.
Why Buy from Mounts Plus
Mounts Plus has been trusted by shooters for over three decades. We only carry optics and mounts we’d use ourselves — no cheap knockoffs, no gimmicks.
What sets us apart:
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Authorized Dealer: Trijicon, Holosun, and Vortex products are 100% genuine.
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Fast Shipping: In-stock optics ship within 24 hours.
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Expert Support: Real shooters ready to answer compatibility questions.
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Satisfaction Guarantee: If it doesn’t fit, we’ll help you find what does.
From range-ready upgrades to duty-grade setups, we help shooters get it right the first time.
Order Your SIG P320 Red Dot Sight Today
Enhance your P320 with an optic that matches its capability. Whether you’re adding a Trijicon RMR, Holosun 507C, or Vortex Venom, Mounts Plus has the red dot sight that fits your build and your budget.
In Stock & Ready to Ship
No Gunsmith Required
Precision Optics for Every SIG SAUER P320
Frequently Asked Questions (FAQ)
Q: What red dots fit the SIG P320?
A: Most optics-ready P320 models fit Trijicon RMR, Holosun, and Leupold DPP footprints. Always confirm your slide cut before purchasing.
Q: Is the SIG P320 optics ready?
A: Many models are. The P320 XCarry, XCompact, and X5 Legion come from the factory optics-ready. Others may require an adapter plate.
Q: Do I need a mounting plate for my P320 red dot?
A: If your slide isn’t pre-cut for your optic footprint, yes — we carry adapter plates for RMR, DPP, and Holosun patterns.
Q: What’s the best red dot for the SIG P320?
A: The Trijicon RMR Type 2 is the most durable, while the Holosun 507C X2 offers the best value for its features.
Q: How do I zero a red dot on my P320?
A: Start at 10 yards, adjust windage and elevation until centered, then confirm at 25 yards for precision.