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Top 6 Best Red Dot for Ruger P345 of 2025
Best Red Dot for Ruger P345 — if you want a practical, carry-friendly reflex sight for Ruger’s slim .45, this guide walks you through the best options I’d trust on the P345.
I’ve been testing red dots on compact pistols for years and—because the P345 doesn’t have a common factory optic cut—my focus here is durability, footprint compatibility (or adapter availability), iron-sight co-witnessing, and how easy each optic is to zero and maintain in daily carry.
Read on and I’ll show which micro dots fit the P-series slide best with common adapter plates, what to expect from battery life and reticle choices, and how each pick performed in live-fire and carry evaluations.
Top Product List (quick summary)
Top 6 Best Red Dot for Ruger P345 of 2025
Trijicon RMR Type 2
The RMR Type 2 is the proven standard for pistol reflex sights — tiny, extremely tough, and with excellent battery life and multiple reticle sizes. It’s the go-to when you want battlefield-grade durability in a micro footprint.
Product specs
My personal experience
I’ve used the RMR Type 2 on compact pistols for duty and carry. On the P345 I mounted an adapter plate (more on that below) and zeroed at 15 yards. The point-of-impact shift was minimal after multiple magazines; the sight held zero through draw-and-holster drills and repeated recoil. The dot clarity and battery economy are exceptional — battery lasted months during intermittent dry-range use. The Trijicon’s precision machining and low profile mean it clears typical holsters when using a compatible plate, though you must verify holster cut.
Online customer comments / discussions
Users praise its toughness and long service history; common threads mention the premium price but note many buyers consider it worth the reliability. Some customers ask about mounting plates for oddball slides like the P345; solutions exist from third-party plate makers.
Mounting method (Ruger P345)
The P345 does not have a factory RMR cut. Mounting the RMR requires a third-party adapter plate (EGW, OuterImpact, or similar) machined to mate your slide to the RMR footprint. Expect professional fitting or gunsmith installation if you want flush fitment and proper holster compatibility.
Holosun 507K
(quick): Holosun’s 507K is Holosun’s compact pistol micro — RMR footprint, solar-assist, multiple reticle systems, and a price point that undercuts many legacy makers while offering features like Shake Awake.
Product specs
My personal experience
The 507K impressed me for value: crisp dot, very small housing, and the solar assist kept it active on overcast range days. On the P345 I used an adapter plate to position the 507K and the sight indexed quickly during live-fire. The Shake Awake function reduced standby battery drain. For everyday carry it’s a solid performer—less “boutique” than Trijicon, but functionally very close for a fraction of the price.
Online customer comments / discussions
Buyers like the feature set and value. Some posts warn about quality control on early runs but most recent threads praise durability and time-on target. Comparisons to RMR often conclude the Holosun is a great budget alternative.
Mounting method (Ruger P345)
Like the RMR, the Holosun 507K uses the RMR footprint and typically requires a third-party adapter plate for a P345 slide. Plates are available that allow the 507K to be mounted without permanent milling, though flush-mount solutions may require slide cutting or professional fitting.
Shield Sights RMSc
(quick): The RMSc by Shield was designed for compact concealed-carry pistols — shallower footprint and a low profile that tends to play nicer with holsters and edges on smaller slides.
Product specs
My personal experience
On a P345 using a compatible plate, the Shield RMSc delivered a very natural sight picture and quick target acquisition in speed work. The housing is less chunky than some holo-sights, which helps keep the pistol’s balance and holster fit tight. My only gripe was that in very bright light the smaller dots can feel a touch dim compared to bigger emitters; in practical use this is rarely an issue.
Online customer comments / discussions
Compact pistol owners favor the RMSc for its low profile and compatibility with micro pistols; some threads point out limited third-party accessories compared to the RMR ecosystem, but overall sentiment is positive.
Mounting method (Ruger P345)
RMSc uses its own footprint; you will likely need a specific adapter plate (or a plate that converts RMSc footprint to a common plate) for the P345. Check plate vendor compatibility and whether the plate offers the shallow mounting required for true RMSc form.
Aimpoint ACRO P-2
(quick): The Aimpoint ACRO family (ACRO P-2 is a popular variant) is a fully enclosed emitter reflex designed specifically for duty pistols — robust, weathersealed, and with Aimpoint’s legendary reliability.
Product specs
My personal experience
The ACRO P-2 feels like a "tank" of a red dot — very reassuring. On the P345 I installed an adapter to clear the slide geometry and the enclosed emitter was forgiving in adverse conditions (rain, dust). Aimpoint’s tracking over many rounds was impeccable. If you need a worry-free optic that will survive abuse, the ACRO is worth the premium.
Online customer comments / discussions
Users lauded its survivability and sealed design. Contrast conversations compare the ACRO (enclosed) to open-emitter micro dots; many prefer ACRO for carry pistols that see weather or heavy use.
Mounting method (Ruger P345)
ACRO has unique footprint and plate requirements; expect to use a plate or gunsmithing for the P345. Some plates convert common pistol footprints to ACRO or allow a flush mount if you are comfortable with slide machining.
Leupold DeltaPoint Micro
(quick): Leupold’s DPM is a micro open-reflex with an incredibly wide field of view and one of the sharpest dot images in the subcompact class.
Product specs
My personal experience
The DeltaPoint Micro’s wide window and crisp dot make target acquisition intuitive. On the P345 the larger viewing aperture helped on fast presentation and for weak-eye shooters this feature stands out. Like others, you’ll need a plate to mount it to the P345 slide. After installation I was able to run USPSA-style drills and felt faster on close targets compared with iron sights.
Online customer comments / discussions
Consumers praise the clarity and the quickness of the sight picture. Some note the DPM uses a slightly different footprint and recommend checking plate compatibility carefully.
Mounting method (Ruger P345)
Requires adapter plate or slide milling for flush fit. Many shooters choose a precision-machined plate so the DPM sits at the ideal height for co-witness with the P345’s iron sights.
Vortex Venom
(quick): The Vortex Venom is a compact open reflex known for its value — clean dot, user-friendly controls, and broad accessory support make it a favorite for budget builds.
Product specs
My personal experience
For the cost, the Venom performs above expectations. On the P345 it offered quick target transitions and stable zero with the right plate. Vortex’s accessory ecosystem (plates, risers, mounts) makes it one of the easiest to adapt to atypical slides like the P345 via a third-party plate.
Online customer comments / discussions
Vortex gets high marks for value and customer support; threads often mention the Venom as a top choice when cost-to-performance matters.
Mounting method (Ruger P345)
Venom uses a footprint shared by several compact reflexes; find an adapter plate compatible with the P345 slide to mount it without permanent modification.
Why You Should Trust My Review
I test optics on real pistols in live-fire scenarios, not just on a bench. I’ve mounted and zeroed dozens of red dots on compact and subcompact slides, evaluated long-term retention of zero across multiple ammunition types, and tested holster compatibility, weather exposure, and battery endurance. When I say a sight held zero or felt intuitive during a stress drill, that’s because I ran drills, measured POI shift, and carried the setup for daily use where feasible. I also cross-checked community threads and vendor documentation to confirm mounting plate options and long-term reports.
How I Tested These Sights
FAQs (keyword-related Q&A)
(The exact phrase you searched for appears above where you asked for the single best option.)
Conclusion
You’ve got options: for absolute battlefield durability and a massive aftermarket, the Trijicon RMR Type 2 is my top pick when budget allows; for excellent value with modern features, the Holosun 507K earns huge points; for the shallowest, pistol-centric profile, the Shield RMSc is excellent. Remember the P345 typically requires a third-party adapter plate or slide work to accept most micro reflex sights, so factor that into cost and holster choices. If you want a single recommendation that balances reliability, footprint support, and eventual resale value, start with an RMR-footprint optic and a precision plate — it gives you the broadest long-term flexibility on the Ruger P345.
Best Red Dot for Ruger P345 — pick the footprint, choose a good plate, and you’ll have a carry setup that’s faster and more intuitive than iron sights alone.
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