8 Glock 34 Gen 5 Mos of 2026 For Competition Builds

1

XS Sights R3D 2.0 Sights Compatible with Glock 17, 19,

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• ARS Mark

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  8.9
• Brand
  XS Sight Systems

Key specs2

Platform Compatibility

Fits Glock Gen 1 through Gen 6 slides across standard and long-slide platforms, including MOS variants like the G34.

Optic Co-Witness Setup

Check sight blade height against your installed MOS adapter plate to confirm whether it clears your reflex sight window.

Pros & cons32

Pros

• Engineered to fit Glock Gen 1 through Gen 6 slides including factory MOS models
• Standard dovetail rear and front screw mount fit full-size G34 competition slides
• Replaces plastic factory sights with rugged all-metal construction

Cons

• Sight blade elevation is unstated and must be checked to confirm red dot co-witness
• Requires a sight pusher or manual drift punch tool to install without slide damage

2

Handleitgrips Compatible for Glock 17/22/ 34/35/ Glock 47 Gen 5/Gen

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  8.7
• Brand
  Handleitgrips

Key specs2

Frame Fitment

Glock 17, 22, 34, 35, 47 Gen 5 and Gen 5 MOS

Surface Application

Applies directly over the factory polymer grip to increase friction without altering trigger reach.

Pros & cons32

Pros

• Cut precisely for Glock Gen 5 and Gen 5 MOS full-size frames including the G34
• Enhances perimeter traction to control muzzle flip during rapid shot strings
• Adhesive wrap applies without altering the factory grip angle or trigger reach

Cons

• Surface durability depends heavily on careful frame cleaning prior to installation
• Specific grip material composition is not detailed on the product listing

3

2 Pack Beavertail Backstrap adapte for Glock Gen 4-5 17,19X,22,31,34,35,37

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  7.9
• Brand
  Zzhununt

Key specs2

Package Contents

2 beavertail backstrap adapters

Slide Bite Protection

Extends frame coverage under the slide to help shooters run a high support-hand grip on the G34.

Pros & cons32

Pros

• Supplied as a two-pack to customize the rear grip profile on Gen 4 and Gen 5 frames
• Extended beavertail tang guards against slide bite when establishing a high grip
• Fits full-size Glock frames including the Glock 34, 17, and 22

Cons

• Specific backstrap thickness options are not listed and need verification
• Retaining pin hardware inclusions are not specified in the product data

4

Glock34 Compatible IWB & OWB kydex Gun Holster for Glock

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  8.4
• Brand
  niufeek

Key specs2

Carry Configuration

• Inside waistband concealment
• Outside waistband belt carry
• Adjustable ride height and cant angle

Holster Material

Molded Kydex polymer

Pros & cons42

Pros

• Molded specifically for the Glock 34 length with clearance for Gen 4, Gen 5, and MOS
• Convertible hardware supports both inside-the-waistband and outside-the-waistband carry
• Allows height and cant angle adjustments to fine-tune draw stroke positioning
• Formed Kydex shell ensures positive trigger guard coverage during dynamic movement

Cons

• Full-length 34 slide profile increases bulk when carried in an inside waistband setup
• Optic clearance cut dimensions for wider competition sights are not documented

5

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

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  9.5
• Brand
  Ade Advanced Optics

Key specs2

Optic Platform

Glock MOS slide compatible reflex sight

Slide Compatibility

Designed for full-size and long-slide MOS pistols including the Glock 17, 19, 34, 35, 40, and 41.

Pros & cons32

Pros

• Manufactured for Glock MOS factory slide cuts including models 17, 19, and 34
• Open reflex window offers fast target acquisition for competition and range use
• Provides a red dot aiming solution without requiring custom slide milling

Cons

• Exact footprint pattern and mounting screw pitch are not detailed in the listing
• Battery housing location and rated runtime figures are not provided

6

DPP Titanium Adapter Plate Compatible with Glock Gen 3 to

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  8.2
• Brand
  DPP Titanium

Key specs2

Optic Footprint Match

• Trijicon RMR and SRO
• Holosun 407C, 507C, and 508T
• Glock MOS factory slide cut

Plate Construction

Machined titanium

Pros & cons32

Pros

• Machined from titanium for high structural rigidity under rapid slide cycling
• Mounts Trijicon RMR, SRO, and Holosun 407C, 507C, and 508T optics to MOS cuts
• Compatible across Glock Gen 3 through Gen 5 factory MOS slide platforms

Cons

• Does not accommodate micro-compact red dot footprints such as the RMSc or 507K
• Mounting screw torque limits must be checked carefully to prevent thread stripping

7

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

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  8.5
• Brand
  Ade Advanced Optics

Key specs2

Mounting Interface

Features an integrated MOS pattern interface made to sit directly onto Glock MOS slides.

Pistol Model Fit

Matches Glock MOS models 17, 19, 34, 35, 40, and 41 without requiring custom slide machining.

Pros & cons32

Pros

• Dedicated MOS base configuration aligns with Glock factory MOS mounting patterns
• Supports full-size and long-slide MOS pistols including the G34 and G35
• Reflex sight design aids rapid sight tracking between multiple target transitions

Cons

• Reticle dot size in MOA is omitted from the listing and must be verified
• Iron sight co-witness height compatibility is unstated on the product page

8

TOFEIC Grip Frame Insert Plug for Gen 4/5 Glock 17

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  7.6
• Brand
  TOFEIC

Key specs2

Grip Plug Function

Seats inside the rear frame channel on Gen 4 and Gen 5 Glocks to keep out dust and debris.

Frame Generation Fit

Glock Gen 4 and Gen 5 full-size frames

Pros & cons32

Pros

• Closes the hollow cavity behind the magazine well on Gen 4 and Gen 5 Glock frames
• Helps guide magazine basepads smoothly into the grip during fast reloads
• Prevents dirt, grit, and range debris from gathering inside the open frame channel

Cons

• May conflict with certain aftermarket competition flared magwell attachments
• Must be removed if switching out modular factory backstraps on Gen 5 grips

Last update on 2026-09-15 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

Which red dot reflex sights mount directly to the Glock 34 Gen 5 MOS slide?

Certain reflex sights mount straight to the factory MOS cut without requiring an extra adapter plate. Sights like the Ade RD3-013 and Ade RD3-009-MOS are listed specifically for Glock MOS models including the 17, 19, 34, 35, 40, and 41. If you run reflex sights built on other footprints, verify the screw pattern and footprint requirements before mounting to ensure a solid fit.

Which adapter plates secure popular red dots to an MOS platform?

Mounting plates must match both the slide cut and the specific footprint of your optic housing. The DPP Titanium adapter plate is engineered for Glock Gen 3 to Gen 5 17 and 19 MOS cuts to hold the Holosun 407, 507C, and 508T, as well as the Trijicon RMR and SRO. If you are comparing your setup to a Glock 17 accessory fit or assembling an optic on a 34 slide, check that your screw lengths match the manufacturer specifications so the plate locks down tight without bottoming out.

Will a Glock 34 Gen 5 MOS fit inside standard kydex holsters?

No, standard holsters built for compact frames usually lack the extended slide channel and optic relief needed for a competition setup. A dedicated Glock 34 compatible IWB and OWB kydex holster accommodates the extended slide of the G34 across Gen 4 and Gen 5 MOS models, while also fitting the G17, G19, G25, and G45 across Gen 3 through 5. Look for designs that offer height and angle adjustments so you can maintain clearance for your optic hood, much like planning a Glock 45 optic and holster configuration.

Which backup iron sights work on a Glock 34 MOS slide?

You need sights specifically designed with MOS slide dimensions and optic clearances in mind. XS Sights R3D 2.0 sights are compatible with Glock Gen 1 through Gen 6 models, including MOS versions of the 17, 19, 22, 23, 24, 26, 27, 28, 31, 32, 33, 34, 35, 36, 38, 39, 45, and 47. Standard-height factory irons sit too low in the dovetail to be visible over an installed reflex sight base. Confirm the blade height on the manufacturer listing to ensure your backup sights align within your optic window.

How do you improve grip control on the Gen 5 frame during rapid fire?

Adding textured overlays and contoured backstraps helps stabilize the full-size frame without permanently modifying the polymer. Handleitgrips are compatible with Glock Gen 5 and Gen 5 MOS models including the 17, 22, 34, 35, and 47 to address frame slickness during long strings of fire. A 2-pack beavertail backstrap adapter engineered for Glock Gen 4 and Gen 5 models, including the 17, 19X, 22, 31, 34, 35, and 37, also helps manage recoil by supporting a high grip on the frame tang.

Can you use grip frame plugs across Gen 4 and Gen 5 full-size frames?

Yes, select frame inserts seat cleanly into both generation styles. The TOFEIC grip frame insert plug installs into the open frame cavity on Gen 4 and Gen 5 Glock models including the 17, 18, 19, 22, 23, 31, 34, 35, 37, and 38. This plug seals the lower opening behind the magazine well to keep out range debris. Verify that your specific backstrap configuration leaves the internal cavity open before seating the plug into place.