4 Best Red Dots For Glock 34 Gen 5 Mos of 2026 That Hold Zero

1

Ade RD3-013 Red Dot Reflex Sight for Glock MOS 17

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• ARS Mark

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  9.5
• Brand
  Ade Advanced Optics

Key specs2

Slide Compatibility

Engineered for Glock MOS platforms, mating directly with the slide cut for models like the Glock 34 Gen 5 without requiring separate aftermarket milling.

Hardware Confirmation

• Check included screw lengths before installation
• Verify MOS plate requirements against your Glock slide
• Confirm dot MOA specifications for competition use

Pros & cons32

Pros

• Designed specifically for Glock MOS slides including models 17, 19, 34, 35, 40, and 41
• Reflex sight layout provides an open sight picture for rapid handgun target acquisition
• Compact red dot footprint suited for long-slide competition pistols like the Glock 34

Cons

• Manufacturer does not specify dot MOA size, requiring verification prior to purchase
• Exact battery type and runtime figures are not detailed in the product listing

2

Ade RD3-009-MOS Red Dot Reflex Sight for Glock MOS 17

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  8.5
• Brand
  Ade Advanced Optics

Key specs2

Platform Matching

Glock MOS 17/19/34/35/40/41

Setup Verification

Check whether mounting screws match your factory MOS plate threading to prevent thread stripping under Glock 34 slide recoil.

Pros & cons32

Pros

• Dedicated Glock MOS configuration tailored for full-size and long-slide frames like the Glock 34
• Open reflex sight style promotes fast visual pickup during rapid-fire strings
• Listed compatibility spans full-size Glock MOS variants across multiple calibers

Cons

• Listing does not confirm reticle MOA dimensions for precise target grouping
• Illumination adjustment levels and switch types must be verified with the seller

3

Zulisy S6-GM 6MOA Direct Mount Red Dot Sight for Full-Size

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  8.1
• Brand
  Zulisy

Key specs3

Reticle Size

6 MOA Red Dot

Mounting Design

Direct mount interface secures straight to full-size Glock MOS slides, eliminating intermediate adapter plates that can loosen under repetitive recoil.

Model Suitability

• Full-size Glock MOS Gen 4 and Gen 5 slides
• Fast target transitions in competition courses
• Shooters seeking a lower optic deck height

Pros & cons42

Pros

• Direct mount design installs directly onto Glock MOS slides without an extra adapter plate
• Features a 6 MOA red dot reticle optimized for rapid close-range visual acquisition
• Explicitly configured for Gen 4 and Gen 5 full-size Glock MOS pistols including the Glock 34
• Eliminates extra mounting plate stack height for a lower optic sitting profile

Cons

• 6 MOA dot covers more target area at extended distances compared to smaller 2 MOA or 3 MOA dots
• Specific waterproof rating and battery change mechanism are not detailed in the listing

4

Ade RD3-012 Red Dot Reflex Sight for Glock MOS 17

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  ARS Mark is a ranking system developed by bestairriflescopes.com. ARS Mark has no relationship or impact from any manufacturers or sales agent websites. Learn more

  7.2
• Brand
  Ade Advanced Optics

Key specs2

MOS Interface

Glock Factory MOS Slide

Pre-Mount Checklist

• Confirm screw length matches your Glock 34 MOS slide depth
• Check adjustment click values on the product manual
• Verify battery access location before mounting

Pros & cons32

Pros

• Engineered for Glock MOS slides across competition and duty models including the 34, 17, and 35
• Open reflex housing provides an unobstructed field of view for quick target alignment
• Compact profile balances well along the extended slide of a Glock 34 MOS

Cons

• Product listing omits the reticle MOA size, requiring confirmation before match use
• Elevation and windage turret adjustment values are not explicitly stated

Last update on 2026-10-06 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

Does an optic mount directly to the Glock 34 Gen 5 MOS slide or require an adapter plate?

It depends on the specific sight design. Certain optics, such as the Zulisy S6-GM, are built as direct-mount sights engineered specifically for full-size Glock MOS slides, eliminating the need for an intermediate adapter plate. Other reflex sights, such as the Ade RD3-009-MOS, RD3-012, and RD3-013, are designed for the Glock MOS platform, but you must always verify whether your chosen version secures straight to the slide or utilizes a factory MOS plate.

Will these reflex sights hold zero under rapid slide cycling?

Yes, provided the optic is properly seated and secured to the slide with the correct fasteners. Sights engineered for the MOS system keep windage and elevation adjustments stable against the repeated snap of the slide. If you notice a shift in zero during practice or competition, check for loose screws and confirm that the optic housing rests flush against the mounting surface without any rocking motion.

Why choose a 6 MOA dot size for a competition pistol?

A 6 MOA reticle, like the dot size on the Zulisy S6-GM, provides fast visual pickup during rapid target transitions. On a long-slide pistol like the Glock 34, a distinct dot remains easy to track through slide recoil, which helps you align your next shot without searching the window. For exact illumination adjustments and visibility under bright daylight, check the settings provided in the optic manual.

Can you use these red dots on other Glock models besides the Glock 34?

Yes, models made for full-size MOS slides share compatibility across multiple pistols in the lineup. Sights such as the Ade RD3-013, RD3-009-MOS, and RD3-012 list compatibility with Glock MOS 17, 19, 34, 35, 40, and 41 models. Similarly, the Zulisy S6-GM is designed to fit full-size Glock MOS Gen4 and Gen5 slides.

Can you co-witness standard factory sights through an MOS red dot?

Standard factory Glock sights sit low on the slide and are generally obscured by the base of an optic mounted in the MOS cut. To achieve a functional backup sight picture through your window, pair your setup with taller iron sights for cowitness that clear the optic deck. Always measure your optic deck height to verify the correct iron sight blade height for your slide.

What should you verify to prevent loose screws and stripped threads on an MOS slide?

Check the thread pitch and total screw length before tightening hardware into your slide. Screws that are too long can bottom out against the slide channel or pin internal components on the right side of the extractor depressor plunger, while screws that are too short will strip under slide recoil. Refer directly to your optic installation manual for the recommended thread locker and proper torque values.