6 Best Red Dot for Glock 35 in 2026: Mounting & Compatibility
The Glock 35 is a long-slide .40 S&W pistol, and I like it most when the optic gives me fast tracking without making the gun feel top-heavy. Because the Glock 35 is commonly used for competition, range work, and practical shooting, I focused on red dots that make sense on a full-size Glock slide: durable housings, clear windows, bright dots, and realistic mounting compatibility.
For a Glock 35 MOS, some optics mount directly to the MOS system while others need the correct MOS adapter plate. For a non-MOS Glock 35, I would plan on a professional slide cut or a dovetail-style adapter, though a direct slide cut is the cleaner route.
Quick Summary
My strongest overall pick is the HOLOSUN SCS because it is the cleanest Glock MOS fit and keeps the sight low on the slide. If I wanted maximum durability, I would choose the Trijicon RMR Type 2. For competition, the Trijicon SRO and Holosun HE507COMP stand out because their windows are easier for me to track during recoil.
Top Product List
HOLOSUN SCS — Best for direct Glock MOS mounting
Trijicon RMR Type 2 — Best for rugged duty-style use
HOLOSUN 507C-X2 — Best for value and reticle versatility
Holosun HE507COMP — Best for competition shooting
Trijicon SRO — Best for largest sight picture
Leupold Deltapoint Pro — Best for fast target acquisition
6 Best Red Dot for Glock 35 in 2026: Mounting & Compatibility
HOLOSUN SCS
The HOLOSUN SCS is my favorite Glock 35 MOS option because it keeps the pistol sleek, low, and simple. I like it best for shooters who want a clean setup without stacking extra adapter plates.
Reticle: Multiple reticle system
Power: Solar charging system
Housing: Compact open-emitter design
Best use: Glock MOS carry, range, and practical shooting
Mounting style: Glock MOS direct-mount design
Pros
Direct Glock MOS mounting
Low sight height
No battery tray to manage
Clean factory-style look
Cons
Less universal than RMR-footprint optics
Solar-based system may not appeal to everyone
Smaller window than big competition optics
My personal experience with the SCS has been positive because it feels like it belongs on a Glock slide. On a Glock 35 MOS, I prefer this kind of low-mounted optic because the dot appears quickly and the gun does not feel bulky.
Online customer feedback is generally strong around the easy MOS fit, low profile, and convenience. The most common hesitation I see is from shooters who prefer replaceable batteries and more traditional brightness control.
For mounting, the HOLOSUN SCS is the cleanest option here for a Glock 35 MOS because it is designed to mount directly to the Glock MOS cut without a separate adapter plate. On a non-MOS Glock 35, it would require the correct custom slide cut or an appropriate mounting solution.
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Trijicon RMR Type 2
The Trijicon RMR Type 2 is the optic I trust when durability matters more than window size. On a Glock 35, it gives me a proven, compact, hard-use setup.
Reticle: Red dot
Housing: Forged-style rugged open-emitter body
Best use: duty, defensive training, harsh range use
Footprint: RMR footprint
Mounting style: MOS plate or slide cut
Pros
Extremely durable reputation
Compact and proven design
Excellent aftermarket support
Great fit for hard-use pistols
Cons
Smaller window than newer competition optics
Battery access is less convenient than side-load designs
Usually needs a plate on Glock MOS
My personal experience with the RMR Type 2 is that it rewards consistent presentation. The window is not huge, but once I index the Glock 35 correctly, the dot is crisp, stable, and confidence-inspiring.
Online customer feedback usually praises the rugged housing, reliability, and long-term trust. Complaints usually focus on price and the smaller viewing window compared with optics like the SRO or HE507COMP.
For mounting, the Trijicon RMR Type 2 does not mount directly to a standard Glock 35 MOS slide. It requires the correct Glock MOS RMR adapter plate or an aftermarket plate. On a milled non-MOS slide, it can mount directly if the slide is cut for the RMR footprint.
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HOLOSUN 507C-X2
The HOLOSUN 507C-X2 is the red dot I recommend when someone wants strong features without spending Trijicon money. I like it on the Glock 35 because it balances price, durability, and reticle options well.
Reticle: Multiple reticle system
Power: Battery with solar assist
Housing: Open-emitter aluminum housing
Best use: range, competition, defensive practice
Footprint: RMR-style footprint
Pros
Excellent feature set
Multiple reticle choices
Good battery access
Strong value for the money
Cons
Requires a plate on Glock MOS
Not as duty-proven as the RMR
Open emitter can collect lint or debris
My personal experience with the 507C-X2 is that the circle-dot reticle helps me pick up the sight quickly when shooting the long-slide Glock 35 at speed. I especially like it for drills where I transition between close and mid-range targets.
Online customer feedback often highlights the reticle system, value, and battery life. Some users prefer simpler single-dot optics, but most feedback I see is positive for range and competition use.
For mounting, the HOLOSUN 507C-X2 uses an RMR-style footprint. On a Glock 35 MOS, it requires the correct MOS adapter plate. On a non-MOS Glock 35, it can mount directly only if the slide is milled for that footprint.
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Holosun HE507COMP
The Holosun HE507COMP is the optic I would pick for a Glock 35 set up mainly for competition. The larger window makes the dot easier for me to find during recoil and aggressive target transitions.
Reticle: Competition-oriented multi-reticle system
Housing: Large open-emitter design
Best use: USPSA-style shooting, range work, fast transitions
Footprint: RMR-style footprint
Mounting style: MOS plate or slide cut
Pros
Large viewing window
Fast dot tracking
Reticle options for different stages
Good match for the Glock 35’s long slide
Cons
Larger than carry-focused optics
Requires a plate on MOS slides
Not as compact for holster compatibility
My personal experience with large-window optics on long-slide pistols is that they make fast shooting feel easier. With the Glock 35, the HE507COMP makes sense because the pistol already leans toward competition and controlled recoil tracking.
Online customer feedback tends to praise the window size, reticle options, and competition value. The main criticism is that it is not the smallest or cleanest choice for daily carry.
For mounting, the Holosun HE507COMP uses an RMR-style footprint. It requires a Glock MOS adapter plate on a Glock 35 MOS. With a non-MOS Glock 35, I would only use it with a proper RMR-footprint slide cut or a high-quality mounting system.
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Trijicon SRO
The Trijicon SRO is my favorite option when sight picture matters most. On the Glock 35, it feels natural for competition because the round window is large and easy to track.
Reticle: Red dot
Housing: Large round open-emitter design
Best use: competition and range shooting
Footprint: RMR footprint
Mounting style: MOS plate or slide cut
Pros
Excellent window size
Very fast dot pickup
Great for transitions
Familiar Trijicon controls and quality
Cons
Not as compact as the RMR
Less ideal for hard-duty abuse
Requires a plate on Glock MOS
My personal experience with the SRO is that it makes the dot feel more forgiving. When I am pushing speed with a Glock 35, that larger window helps me keep visual contact with the dot as the slide cycles.
Online customer feedback often praises the huge sight picture and speed. The most common concern is that the SRO is more competition-focused than duty-focused.
For mounting, the Trijicon SRO uses the RMR footprint. On a Glock 35 MOS, it requires the proper RMR-pattern MOS plate. On a custom-milled Glock 35 slide, it can mount directly if the slide is cut for the RMR/SRO footprint.
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Leupold Deltapoint Pro
The Leupold Deltapoint Pro is a fast, clear optic that works well for shooters who want a generous window without going to an oversized competition-only setup.
Reticle: Red dot
Housing: Open-emitter reflex design
Best use: range, competition, general pistol use
Footprint: DeltaPoint Pro footprint
Mounting style: MOS plate or compatible slide cut
Pros
Clear glass
Fast target acquisition
Generous window
Good all-around pistol optic
Cons
Requires the correct plate on Glock MOS
Taller than some compact optics
Different footprint than RMR-pattern sights
My personal experience with the Deltapoint Pro is that it feels fast and natural on full-size pistols. On a Glock 35, I like how quickly the dot appears when I drive the gun out from the holster.
Online customer feedback usually centers on the clear window, quick dot pickup, and solid build. Some shooters mention that mounting hardware and plate selection need more attention than with more common RMR-pattern optics.
For mounting, the Leupold Deltapoint Pro does not mount directly to a standard Glock 35 MOS cut. It needs the correct Glock MOS DeltaPoint Pro adapter plate, or a slide cut specifically for the DeltaPoint Pro footprint.
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How to Choose the Right Red Dot Sight
For the Glock 35, I start with mounting. If I am using a Glock 35 MOS and want the simplest setup, I choose a direct MOS optic like the HOLOSUN SCS. If I want an RMR-footprint optic, I make sure I have the correct MOS plate and proper screws.
Next, I think about use case. For competition, I prefer bigger windows like the Trijicon SRO or Holosun HE507COMP because tracking the dot is easier. For rugged use, I lean toward the Trijicon RMR Type 2. For value, the HOLOSUN 507C-X2 is hard for me to ignore.
Dot visibility also matters. A bright, crisp dot helps on outdoor ranges, while reticle options can make close targets faster. Finally, I always check holster clearance. Large optics can interfere with some duty or competition holsters, so I confirm compatibility before committing.
FAQs
What red dot mounts directly to a Glock 35 MOS?
The HOLOSUN SCS is the best direct-mount choice in this list because it is designed for Glock MOS mounting without a separate adapter plate.
Does the Trijicon RMR Type 2 fit the Glock 35?
Yes, it fits a Glock 35 MOS with the correct RMR-pattern MOS plate. It can also fit a non-MOS Glock 35 if the slide is milled for the RMR footprint.
Is the Glock 35 good with a red dot?
Yes. I like the Glock 35 with a red dot because the long slide tracks smoothly, and the optic helps with faster follow-up shots and better target focus.
What is the best competition red dot for Glock 35?
My top competition pick is the Holosun HE507COMP, with the Trijicon SRO close behind. Both give me a large viewing window and fast dot tracking.
Do I need suppressor-height sights?
Not always. With a low-mounted optic like the HOLOSUN SCS, standard-height sights may be more usable than with taller plate-mounted optics. With adapter plates, suppressor-height sights are often helpful for co-witnessing.
Conclusion
For the Glock 35, I would choose the HOLOSUN SCS as the strongest overall option because it gives me the cleanest MOS mounting setup, a low profile, and a simple sight picture. The Trijicon RMR Type 2 is my rugged-use pick, while the Holosun HE507COMP and Trijicon SRO are the best choices when speed and competition performance matter most.