Glock 34 Gen5 MOS
- Category
- Pistol
- Barrel
- 135 mm
- Weight, empty
- 743 g
- Introduced
- 2018
About
What it is, and why it matters
The Glock 34 Gen5 MOS is the competition-oriented variant of the Glock full-size pistol family, featuring a 135mm (5.31") extended barrel and longer slide compared to the standard Glock 17. Originally introduced as the Glock 34 in 1998 as the company's first purpose-built competition pistol, the Gen5 MOS variant was announced in January 2018 at SHOT Show. It incorporates all Gen5 improvements including the Glock Marksman Barrel (GMB) with enhanced polygonal rifling and improved barrel crown, nDLC finish for superior corrosion resistance, ambidextrous slide stop, reversible magazine release, flared magazine well, and no finger grooves. The Modular Optic System (MOS) provides a precision-machined slide cut with interchangeable mounting plates for popular micro red dot sights. The extended barrel and 191mm sight radius deliver improved accuracy over the Glock 17, while the heavier slide helps tame muzzle flip for faster follow-up shots. It is the preferred Glock for USPSA Production, IDPA Stock Service Pistol, and Carry Optics divisions worldwide.
The Glock 34 was Glock's first purpose-built competition pistol when it debuted in 1998, and its longer slide and lighter trigger pull quickly made it the dominant platform in USPSA Production and IPSC divisions. The Gen5 MOS variant is available only with the optics-ready slide, acknowledging that competitive shooters overwhelmingly mount red dot sights.
The Gen5 Glock 34 is available only in the MOS configuration. The trigger pull is factory-set at approximately 24N (5.4 lbf), lighter than the standard Glock 17 at 28N. Weight with empty magazine is 743g; weight without magazine is 665g. Standard magazine capacity is 17 rounds (shared with Glock 17), with optional 10, 19, 24, and 33-round magazines available. The MOS system ships with adapter plates compatible with Trijicon RMR, Leupold DeltaPoint, Holosun, and other popular micro red dot optics. Sight radius with polymer sights is 191mm, with steel sights 190mm, and with GNS sights 189mm. The slide width is 25.5mm while the overall width including controls is 34mm.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- Glock Ges.m.b.H.
- Category
- Pistol
- Country
- Austria
- Status
- In production
- Produced
- 2018
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 135 mm
- Overall length
- 222 mm
- Height
- 139 mm
- Width
- 34 mm
- Sight radius
- 191 mm
- Weight, empty
- 743 g
- Weight, loaded
- 980 g
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Short recoil
- Firing mechanism
- Striker fired
- Trigger
- Safe action
- Trigger pull
- 24.0 N
- Capacity
- 17
- Magazine
- Detachable box
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Polymer
- Slide
- Steel
- Barrel
- Steel
- Finish
- NDLC
BallisticsFrom the service cartridge, not a handload.
- Muzzle velocity
- 370 m/s
- Muzzle energy
- 550 J
- Effective range
- 50 m
- Maximum range
- 1800 m
Trajectory
What the round does downrange
Solved from the muzzle figures and the bullet. The dashed rule is the effective range on the record, and the crosses are the steps the solver returned.
Features
What it has
What the record lists as fitted, drawn from the catalogue.
Ambidextrous slide stop
Reversible mag release
Flared mag well
Accessory rail
Marksman barrel
Rough textured frame
Front serrations
No finger grooves
Modular optic system
Extended slide stop
Extended mag release
Standing
How it compares
Each figure against the firearms of the same type and cartridge that record it, or of the same type where that cartridge has too few. Positions are read to the nearest tenth.
| Measurement | This firearm | Median | Position |
|---|---|---|---|
| Empty weightAmong 560 9x19mm Parabellum pistols | 743 g | 765 g | Near the median |
| Overall lengthAmong 559 9x19mm Parabellum pistols | 222 mm | 191 mm | Longer than about 80% |
| Barrel lengthAmong 569 9x19mm Parabellum pistols | 135 mm | 105 mm | Longer than about 90% |
| Magazine capacityAmong 571 9x19mm Parabellum pistols | 17 | 15 | Holds more rounds than about 80% |
Answers
Questions about the Glock 34 Gen5 MOS
How much does the Glock 34 Gen5 MOS weigh?
The Glock 34 Gen5 MOS weighs 743 g (1.64 lb) empty and 980 g (2.16 lb) loaded.
What caliber is the Glock 34 Gen5 MOS?
The Glock 34 Gen5 MOS is chambered in 9x19mm Parabellum.
How many rounds does the Glock 34 Gen5 MOS hold?
The Glock 34 Gen5 MOS holds 17 rounds, fed from a detachable box magazine.
How long is the Glock 34 Gen5 MOS?
The Glock 34 Gen5 MOS is 222 mm (8.74 in) long overall, with a 135 mm (5.31 in) barrel.
Who makes the Glock 34 Gen5 MOS?
The Glock 34 Gen5 MOS is made by Glock Ges.m.b.H. (Austria). It was designed by Gaston Glock.
When was the Glock 34 Gen5 MOS introduced?
The Glock 34 Gen5 MOS was introduced in 2018.
How does the Glock 34 Gen5 MOS operate?
The Glock 34 Gen5 MOS uses a short recoil action, and its firing mechanism is striker fired.
Compatibility
Which parts fit this firearm
Studio
Every part that mounts on this, resolved
Not a list the maker typed out: the answer comes from the mounts this firearm exposes and the interface each part needs, so it stays right when either one changes.
- Every part that mounts on any firearm in the catalogue
- Interface standards, platforms and fit overrides
- The same answers through the API and the MCP server
Requires a signed-in GunSpec account on the Studio plan. The answer is computed per part, so it is not part of the public record.
Provenance
What the record holds
Every figure above was taken from one of these pages. The confidence reflects how much of the record came from a page a claim can be checked against.
In service
- USPSA Competitive Shooters
- United States
- GSSF Competitive Shooters
- United States
Provenance
Confidence in this record
93%
Stockists
Where to buy
Offers link straight to the shop. GunSpec never takes the order.
No shop has listed this firearm yet
Stock and prices come from the shops themselves. If you sell this firearm, you can list it and it appears here.
List a firearmMCP
Ask an assistant about it
The same record, reached the way a person asks for it rather than the way a program does.
Ask GunSpec
Works with
Point an MCP client at GunSpec and it answers from the catalogue rather than from memory. A free key covers the read tools.
API
The call that returns this record
The same fields, in the same units, from the same endpoint the page reads.
curl --request GET \ --url 'https://api.gunspec.io/v1/firearms/glock-34-gen5' \ --header 'X-API-Key: your_key'{ "id": "glock-34-gen5", "name": "Glock 34 Gen5 MOS", "manufacturer": { "id": "glock", "name": "Glock Ges.m.b.H.", "countryCode": "AT", "foundedYear": 1963, "website": "https://www.glock.com", "logoUrl": null, "description": null, "status": null, "defunctYear": null, "stateOwned": null, "makesFirearms": null, "parentId": null, "predecessorId": null, "createdAt": "2026-02-11 23:44:38", "updatedAt": "2026-02-18 03:43:49", "version": "3082b5f3edc3e54ca4f0993c68dba8c456b4f86e8759e3310ef604da566477d6" }, "category": { "id": "pistol", "name": "Pistol", "description": "Handguns designed to be fired with one or two hands" }, "country_of_origin": "AT", "year_introduced": 2018, "barrel_length_mm": 135, "weight_empty_g": 743, "action_type": "short_recoil"}