Enclosed red dot sights can make a major difference for your SIG P320 in rainy weather or snow, especially for those live up north. Here's a look at some standout options to elevate your experience with your favorite firearm.
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Common Problems with Open Emitter Red Dot Sights
- Durability: Open designs are exposed to damage.
- Weather Resistance: Open sights can fog up or gather water and snow clog.
- Battery Access: Some require taking the sight off to change the battery.
- Compatibility: Not all red dots fit onto the P320 with its confusing slide footprint
Top Enclosed Red Dot Sights For P320
Aimpoint ACRO P-2

- Pros: Built tough, enclosed, easy side battery change, lasts long. Tried in tough conditions — ideal for those who need reliability.
- Cons: Steep price, often needs an adapter for fitting.
- Best For: Tactical needs and heavy-duty use.
- Pros: Small, light, very durable. Has recessed lens and many brightness settings.
- Cons: Smaller view window might be a limiter.
- Best For: Concealed carry or tasks where size matters.
- Pros: Modular, fog-proof, several reticle choices. Added MOTAC tech for battery life.
- Cons: By default, not enclosed but adaptable.
- Best For: Fans of the SIG system looking for options.
- Pros: Solid build, solar power, multiple reticles. "Shake awake" keeps the battery going.
- Cons: Needs an adapter to fit the P320.
- Best For: Those watching their budget but want features.
- Pros: Compact, reliable, offers various reticles, and battery is easy to reach.
- Cons: Less view compared to other models.
- Best For: When you want a compact sight for discreet carrying.
- Pros: Tailored for P320, allows co-witness, multiple reticles. Built enclosed for extra toughness.
- Cons: Not always easy to find.
- Best For: P320 users seeking seamless integration.
Considerations and Alternatives
- Cost and Value: Though high-end choices like the Aimpoint ACRO P-2 are pricey (chase $600), they offer impressive toughness. Affordable picks like Holosun HE509T offer durability around $300.
- Misconceptions: Enclosed red dots aren’t just for looks; they provide protection in bad weather.