6 Best Red Dot For Remington 1100 G3 in 2026: Mounting & Compatibility

Best Red Dot For Remington 1100 Competition setups are no longer limited to bulky tube optics or fragile open emitters that fail under heavy shotgun recoil. The modern market offers rugged pistol-style optics with large windows, better sealing, improved battery systems, and mounting footprints that work exceptionally well on competition-ready scatterguns. After testing multiple optics on gas-operated platforms, I found that recoil impulse behavior matters more on the Remington 1100 than many shooters expect. Window clarity during rapid transitions, deck height for natural indexing, and secure mounting systems all affect stage times in practical competition environments.

The Remington 1100 remains one of the smoothest semi-auto shotguns ever built, especially for action shooting disciplines. Pairing it with the right optic dramatically improves target acquisition speed, slug precision, and low-light usability. The key is choosing an optic that balances durability, viewing window size, mounting compatibility, and realistic recoil resistance for thousands of rounds.

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Quick Summary Table

Product	Best For	Footprint	Window	Battery	Durability	Dot Size	Rating
Holosun 507COMP	USPSA/3-Gun	RMR	Extra Large	Side Tray 1632	Excellent	2 MOA / Multi	9.7/10
Trijicon SRO	Fast transitions	RMR	Massive Round	Top CR2032	Excellent	2.5 MOA	9.5/10
Aimpoint Acro P-2	Hard-use reliability	Acro	Medium Closed	CR2032	Outstanding	3.5 MOA	9.4/10
Burris FastFire 4	Budget competition use	FastFire	Large	CR1632	Good	Multi-reticle	8.8/10
Vortex Defender-ST	Wide compatibility	DeltaPoint Pro	Large	Top CR2032	Very Good	3 MOA	9.1/10
SIG Romeo3MAX	Maximum window size	C-More	Huge	Top CR2032	Very Good	3 MOA	9.3/10

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Top Product List: Remington 1100 Competition Optics

• Holosun 507COMP
• Trijicon SRO
• Aimpoint Acro P-2
• Burris FastFire 4
• Vortex Defender-ST
• SIG Romeo3MAX

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Holosun 507COMP

The 507COMP is one of the best-balanced optics currently available for a competition shotgun. It combines a huge viewing window with strong electronics, practical controls, and one of the most useful multi-reticle systems available for rapid target engagement.

Specs

• Footprint: RMR
• Reticle: 2 MOA dot / 8 MOA circle / 20 MOA circle
• Battery: CR1632 side tray
• Housing: 7075 aluminum
• Brightness: 10 daylight + 2 NV
• Waterproof rating: IP67

Pros

• Extremely large sight picture
• Side battery tray simplifies maintenance
• Crisp reticle with minimal flare
• Excellent recoil durability

Cons

• Slight blue lens tint
• Open emitter can collect debris
• Slightly bulkier than standard pistol optics

My hands-on notes

On the Remington 1100, the 507COMP feels exceptionally natural during target transitions. The large window minimizes frame occlusion while swinging between arrays. I noticed very little parallax shift at practical shotgun distances. The deck height also works well with low-profile mounts, allowing a natural cheek weld without excessive head lift.

Button tactility is excellent even while wearing gloves. The side-mounted battery tray is significantly better than bottom-loading systems because it avoids re-zeroing after battery swaps. Under heavy slug loads, the optic maintained zero without flickering or intermittent shutdowns.

What people say online

Competitive shooters on forums and Reddit consistently praise the 507COMP for its oversized window and practical reticle system. Many users consider it a lower-cost alternative to the SRO with better electronics and battery efficiency. Several long-term users also reported strong durability on shotguns and PCC platforms.

Mounting clarity

The RMR footprint gives this optic broad compatibility with shotgun optic rails and aftermarket mounts. Many Remington 1100 competition builds use RMR-compatible adapter plates or drilled receiver mounts, making installation straightforward.

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Trijicon SRO

The SRO remains one of the fastest red dots available for competition shooting. Its massive circular viewing window delivers exceptional peripheral visibility and effortless dot tracking during aggressive transitions.

Specs

• Footprint: RMR
• Dot size: 2.5 MOA
• Battery: Top-load CR2032
• Housing: Forged aluminum
• Brightness settings: 8
• Waterproof: 10 feet

Pros

• Massive viewing window
• Excellent glass clarity
• Top battery access
• Superb dot tracking

Cons

• More exposed housing design
• Expensive
• Not ideal for hard impacts

My hands-on notes

The SRO feels incredibly fast on a gas-operated shotgun. The rounded housing almost disappears during target acquisition. I found the dot exceptionally easy to track during recoil recovery, especially on lighter birdshot loads used in practical competition.

Lens distortion near the edge is minimal. The glass quality is noticeably cleaner than many mid-tier optics, and the lens tint remains subtle. Parallax performance is excellent inside realistic shotgun engagement distances.

The optic sits slightly taller than some competitors, but the deck height still works well with proper mounting plates. The large window significantly improves visual awareness during rapid movement stages.

What people say online

Competition shooters widely regard the SRO as one of the premier optics for speed shooting. USPSA and 3-Gun users consistently praise the window size and natural sight tracking. Some users caution that the housing is less impact-resistant than enclosed optics, but reliability complaints remain relatively uncommon.

Mounting clarity

Because the SRO uses the RMR footprint, mounting options for the Remington 1100 are extensive. Direct-milled shotgun mounts and adapter plates are widely available.

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Aimpoint Acro P-2

The Acro P-2 is the toughest optic in this group and the best option for shooters prioritizing durability over maximum window size. Its enclosed emitter design dramatically improves reliability in harsh environments.

Specs

• Footprint: Acro
• Dot size: 3.5 MOA
• Battery: CR2032
• Battery life: 50,000 hours
• Construction: Closed emitter aluminum housing
• Waterproof: 35 meters

Pros

• Outstanding durability
• Closed emitter protection
• Exceptional battery life
• Reliable under heavy recoil

Cons

• Smaller window
• Higher mounting height
• Premium pricing

My hands-on notes

The Acro P-2 feels extremely solid on the Remington 1100. The enclosed emitter completely eliminates concerns about water, carbon buildup, or debris blocking the emitter during outdoor matches. Under heavy recoil cycles, I experienced zero flickering or shutdown issues.

The smaller window requires slightly more discipline during presentation compared to oversized competition optics. However, once acclimated, target acquisition remains fast and consistent. The dot remains crisp with minimal starbursting.

The side battery compartment is well-designed and easy to access. Button responsiveness is positive even with gloves. I also noticed minimal optical distortion and strong edge clarity.

What people say online

Users consistently praise the Acro P-2 for reliability. Law enforcement and hard-use shooters dominate most discussions, but many competition shooters appreciate its durability on shotguns and PCCs. Long-term reports suggest excellent zero retention even after thousands of rounds.

Mounting clarity

The Acro footprint requires a dedicated mounting plate or Acro-compatible rail section. Many shotgun optics rails now support Acro mounting due to increasing popularity.

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Burris FastFire 4

The FastFire 4 offers impressive value for shooters wanting a lightweight competition optic without entering premium pricing territory. Its large window and practical controls make it surprisingly capable on semi-auto shotguns.

Specs

• Footprint: FastFire
• Reticle: Multiple selectable patterns
• Battery: CR1632
• Brightness: Automatic/manual
• Weight: Lightweight aluminum construction
• Waterproof: Water resistant

Pros

• Affordable
• Lightweight
• Large window
• Flexible reticle options

Cons

• Durability below premium optics
• Auto-brightness can lag
• Less refined glass

My hands-on notes

The FastFire 4 performs better than many shooters expect. The large window helps maintain fast target transitions, especially on steel-heavy stages. During testing, recoil handling remained respectable, though the optic does not feel as overbuilt as premium alternatives.

The glass has a slightly stronger tint and more noticeable edge distortion than higher-end optics. However, the reticle remains easy to acquire and brightness levels stay usable outdoors.

Button ergonomics are acceptable but not exceptional. I also noticed the battery compartment design requires slightly more care during changes. Despite those drawbacks, the optic held zero reliably during extended birdshot sessions.

What people say online

Online discussions often frame the FastFire 4 as one of the best budget-friendly competition optics. Many users appreciate the large viewing window and low weight. Some shooters mention long-term durability concerns under extreme use, but casual competitors generally report positive experiences.

Mounting clarity

The FastFire footprint differs from RMR systems, so compatibility depends on the mount used. Some shotgun rails include adapter plates, while others require dedicated FastFire-compatible mounting hardware.

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Vortex Defender-ST

The Defender-ST combines modern durability with a generous viewing window and excellent controls. It bridges the gap between competition-focused speed and hard-use reliability remarkably well.

Specs

• Footprint: DeltaPoint Pro
• Dot size: 3 MOA
• Battery: Top-load CR2032
• Housing: ShockShield polymer insert
• Brightness: 10 daylight settings
• Waterproof: IPX7

Pros

• Strong durability
• Excellent controls
• Large window
• Great warranty support

Cons

• Slightly thicker housing
• More noticeable tint
• Limited aftermarket plates compared to RMR

My hands-on notes

The Defender-ST handles shotgun recoil confidently. I observed consistent zero retention and no electronic flickering throughout testing. The housing feels reinforced without becoming excessively bulky.

The top-loading battery system is convenient and prevents unnecessary optic removal. Brightness buttons remain easy to manipulate with gloves, and the tactile response is excellent.

Glass clarity is solid overall, although the lens tint appears slightly heavier than premium competition optics. Window distortion remains low, and the optic tracks smoothly during rapid recoil recovery.

Parallax performance is very respectable for practical competition distances. The deck height works best with lower-profile DeltaPoint-compatible mounts to preserve a natural cheek position.

What people say online

Users consistently praise the Defender-ST for toughness and value. Many shooters consider it one of the better modern alternatives to older DeltaPoint-style optics. Competition users particularly appreciate the large window and responsive controls.

Mounting clarity

Because it uses the DeltaPoint Pro footprint, shooters need compatible mounting plates or shotgun rails. Aftermarket support continues improving as the optic gains popularity.

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SIG Romeo3MAX

The Romeo3MAX was designed specifically for competition speed. Its oversized viewing window and ultra-thin frame create one of the fastest visual experiences available for dynamic shotgun shooting.

Specs

• Footprint: C-More pattern
• Dot size: 3 MOA
• Battery: Top-load CR2032
• Housing: Aluminum
• Brightness: Daylight adjustable
• Lens coating: SpectraCoat HD

Pros

• Huge window
• Very fast acquisition
• Thin frame profile
• Excellent clarity

Cons

• Less enclosed protection
• Specialized footprint
• Premium price

My hands-on notes

The Romeo3MAX excels during rapid transitions. The massive window dramatically reduces tunnel effect, making it exceptionally easy to track the dot through recoil cycles. On the Remington 1100, this translates into smoother stage flow and faster visual pickup.

The glass quality is excellent with minimal color distortion. Lens coatings also manage glare effectively under bright sunlight. I noticed very little emitter reflection even during harsh lighting angles.

Button ergonomics feel clean and responsive. The top battery compartment simplifies maintenance, while the low deck profile helps maintain a natural cheek weld.

Durability remains respectable, though the exposed design lacks the protection of enclosed optics like the Acro P-2. Still, for pure competition speed, the performance is outstanding.

What people say online

Competition shooters regularly praise the Romeo3MAX for its gigantic field of view. Many practical shooters report faster target acquisition compared to traditional pistol optics. Long-term durability discussions remain mostly positive, particularly among dedicated competition users.

Mounting clarity

The Romeo3MAX uses a C-More style footprint, which may require dedicated shotgun mounting hardware. Compatibility should always be verified before installation.

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How I Tested / Evaluation Criteria

Parallax Performance

I evaluated parallax shift by deliberately moving my eye position off-center while maintaining target focus at multiple distances. Competition shotguns often involve awkward shooting positions around barricades, so minimizing visible point-of-impact shift matters more than many shooters realize.

The best optics maintained stable aiming references even with imperfect cheek weld consistency. Larger windows generally improved practical forgiveness during rapid movement.

Co-Witness and Deck Height

Shotgun optics sit differently than pistol-mounted dots. Excessive deck height forces unnatural head positioning and slows transitions. I specifically tested how naturally each optic aligned during repeated mounting drills.

Lower-profile optics generally felt faster and more intuitive. However, oversized windows occasionally compensated for taller mounting systems by improving sight acquisition.

Durability

Competition shotguns produce unique recoil characteristics because of their reciprocating mass and prolonged firing schedules. I tested each optic under repeated birdshot and slug use while monitoring for flickering, lens shift, or zero movement.

Housing integrity, emitter stability, and battery contact consistency were all important evaluation points.

Battery Systems

Battery life matters, but battery access matters more in practical competition use. Top-loading and side-loading battery systems dramatically reduce maintenance frustration.

I also examined battery cap design quality because poorly machined caps often become long-term reliability problems.

Brightness Range

Competition shooting occurs in constantly changing lighting conditions. I tested visibility under direct sunlight, indoor shadow transitions, and low-light environments.

The strongest optics offered wide brightness flexibility without excessive blooming or flare.

Glass Quality

Lens clarity directly affects target transitions and eye fatigue. I evaluated tint strength, edge distortion, glare management, and emitter reflection behavior.

The cleanest optics produced a more natural visual experience with less perceived tunnel effect.

Controls and Ergonomics

Competition environments demand fast, intuitive controls. Small recessed buttons may work on concealed-carry pistols but become frustrating during matches.

I specifically evaluated button tactility with gloves and ease of brightness adjustment under stress.

Mounting Ecosystem

The Remington 1100 does not have universal optics compatibility. Some footprints enjoy significantly broader aftermarket support than others.

RMR remains the safest choice for widespread compatibility, while specialized footprints may require dedicated mounting hardware.

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How to Choose the Right Red Dot for This Gun

Choosing the correct optic for a Remington 1100 depends heavily on how the shotgun will actually be used. A pure 3-Gun build prioritizes speed and viewing window size, while a defensive or multi-purpose setup may benefit from enclosed emitters and stronger environmental protection.

The first consideration should always be mounting compatibility. The Remington 1100 was never originally designed around modern micro red dots, so mounting systems matter enormously. Many competition builds rely on drilled-and-tapped receiver mounts or optics-ready rails. Before buying an optic, verify the footprint your mount supports. RMR-compatible systems offer the broadest aftermarket flexibility.

Window size is another critical factor. Larger windows improve target transitions and reduce the tunnel effect common with smaller optics. This becomes especially important during rapid birdshot arrays where maintaining peripheral awareness saves time. Optics like the SRO and Romeo3MAX excel here.

Durability still matters even for competition guns. Shotguns generate sharp recoil impulses that expose weaknesses in battery contacts and emitter assemblies. Budget optics may function well initially but develop flickering issues after prolonged use. Robust electronics and reinforced housings dramatically improve long-term reliability.

Emitter design also deserves attention. Open emitters generally provide larger windows and lighter weight, but they remain vulnerable to carbon, moisture, and debris. Closed emitter optics like the Acro P-2 sacrifice some window size in exchange for dramatically improved environmental protection.

Battery access design is frequently overlooked. Bottom-loading batteries force optic removal during replacement, increasing the risk of zero shift. Side-loading and top-loading systems simplify maintenance substantially.

Finally, consider deck height and cheek weld. Shotguns reward consistent mounting technique. An optic mounted excessively high can slow presentation speed and reduce natural alignment. Lower mounting systems generally feel more intuitive on the Remington 1100 platform.

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FAQs

What footprint works best on the Remington 1100?

RMR remains the most practical choice because of broad aftermarket support. Many shotgun optic mounts support RMR-compatible optics directly.

Are pistol red dots durable enough for shotgun recoil?

Premium optics absolutely are. Models from Aimpoint, Trijicon, and Holosun routinely survive heavy shotgun use when properly mounted.

Is a closed emitter necessary for competition?

Not necessarily. Open emitters usually provide larger windows and faster sight acquisition. Closed emitters mainly improve weather and debris resistance.

What dot size works best for 3-Gun?

Most shooters prefer 2 MOA to 5 MOA dots. Larger dots appear faster during rapid transitions, while smaller dots help with slug precision.

Can the factory Remington 1100 receiver accept optics?

Most require drilling and tapping or an aftermarket rail system. Some competition builds already include optics-ready mounting solutions.

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Conclusion

For shooters building a modern competition shotgun, the Best Red Dot For Remington 1100 Competition ultimately depends on balancing speed, durability, mounting compatibility, and viewing window size. The Holosun 507COMP offers the best overall balance for most competitors, while the Trijicon SRO remains exceptionally fast for aggressive stage shooting. Shooters prioritizing durability should strongly consider the Aimpoint Acro P-2, while budget-conscious competitors can still achieve excellent performance from the Burris FastFire 4.