# Glock 34 Gen 4 MOS Precision 9mm - Modular Optic & Competitive Edge

**Brand:** Glock
**Category:** Full Size Handguns
**Caliber:** 9mm

## Specifications

- **Caliber:** 9mm
- **Barrel Length:** 5.3"
- **Capacity:** 17 rounds
- **Finish:** Black
- **Weight:** 25.9 oz
- **Overall Length:** 8.82"
- **UPC:** 764503913808
- **SKU:** UCDSUOVjE

## Description

The Glock 34 MOS Gen 4 is a semi-automatic pistol built around competitive shooting, though it works equally well in tactical and home defense roles. The longer 5.31-inch barrel stretches the sight radius and keeps muzzle velocity up, which shows in tighter groups at distance. The Modular Optic System cuts a mounting footprint directly into the slide so you can drop on a red dot without milling, a real advantage when conditions change between stages.

### Key Specifications
- **Caliber:** 9mm Luger
- **Barrel Length:** 5.31 inches
- **Overall Length:** 8.74 inches
- **Weight:** 23.28 oz (without magazine), 26.1 oz (with magazine)
- **Capacity:** 17 rounds (standard and extended)
- **Height:** 5.47 inches
- **Frame Material:** Polymer
- **Slide Material:** Forged Steel
- **Action Type:** Double Action
- **Safety Features:** Trigger/Firing Pin/Drop Safety

### Detailed Features

**Longer Barrel**: The 5.31-inch barrel improves accuracy and softens felt recoil, making follow-up shots faster.

**MOS System**: The Modular Optic System accepts red dot sights without any slide modifications, letting you swap optics between guns on the same adapter.

**Grip**: The textured polymer grip holds firm even in wet conditions or with gloves.

**Safety**: Trigger, firing pin, and drop safeties all operate passively. The gun is ready when you draw, with no manual levers to manage.

**Fixed Sights**: Front and rear sights are fixed and co-witnessed for quick alignment when not running an optic.

### Usage Scenarios
- **Competitive Shooting**: Well-suited for IPSC/IDPA where accuracy at distance matters.
- **Home Defense**: 17-round capacity and manageable recoil make it a solid choice.
- **Range Training**: Reliable function and consistent trigger make it easy to build fundamentals.

## What Reviewers Say

*Quoted verbatim from YouTube reviews. Each link opens the video at the moment quoted.*

> The glock 34 is a very durable and reliable firearm let's get that out of the way.
>
> — [Honest Outlaw](https://www.youtube.com/watch?v=OLOuPIWyKxg&t=89s)

> Well you would want it to hold the gun in your hand over recoil which is one of the big knocks of the 34 by comparison to well competition guns in general.
>
> — [Honest Outlaw](https://www.youtube.com/watch?v=OLOuPIWyKxg&t=368s)

> I think this is probably one of the best self-defense pistols a human being can buy on the planet.
>
> — [Honest Outlaw](https://www.youtube.com/watch?v=OLOuPIWyKxg&t=471s)

> I would be careful though because if you cut through this that's a wrap you have to remember when you're doing framework on a glock it's not a sig 320 it's not a 365 it's not an apx.
>
> — [Honest Outlaw](https://www.youtube.com/watch?v=OLOuPIWyKxg&t=611s)

## What Customers Say

*AI-generated insights from customer reviews*

The Glock 34 Gen 4 MOS draws consistent praise from competitive shooters, mainly around accuracy. The longer barrel makes a noticeable difference at distance, and most users who move from a standard G17 or G19 report tighter groups immediately.

The MOS feature gets a lot of attention. Being able to mount different red dots without a gunsmith is genuinely useful, and users switching between platforms appreciate the adapter system. Opinions on the trigger split: the stock pull is smooth enough for most competitors, but experienced shooters often swap in aftermarket parts for a lighter or crisper break.

Ergonomics are generally positive. The grip texture is enough for extended range sessions, and the weight distribution helps control recoil during rapid fire. The one real complaint is size. The G34 is not a small gun, and a handful of users find it awkward for anything other than range or competition use.

Price comes up occasionally. It sits above Glock's standard lineup, and some buyers compare it against dedicated competition guns from other makers. Most who buy it consider the performance worth the cost; those who don't tend to go with a shorter G17 and a trigger upgrade instead.

## Pricing

**2 offers available**

| Vendor | Price |
|--------|-------|
| Gunbuyer Com | $674.71 |
| Guns Com | $1000.99 |

## Similar Products

- [Glock 34 Gen5 MOS 9mm - Precision Optics-Ready Competition Pistol](https://gunsnation.com/p/glock-34-gen5-mos-9mm-precision-optics-ready-competition-pistol/UCDSUKnoe)
- [Glock G34 Gen 3 Precision 9mm - Extended Barrel & Adjustable Sights](https://gunsnation.com/p/glock-g34-gen-3-precision-9mm-extended-barrel-adjustable-sights/UCDSUM7Ew)
- [Glock G17 Gen 4 MOS 9mm - Modular Optics System, Reliable Performance](https://gunsnation.com/p/glock-g17-gen-4-mos-9mm-modular-optics-system-reliable-performance/UCDSUOVdZ)
- [Glock G34 Gen 4: Precision 9mm Competition & Defense Pistol](https://gunsnation.com/p/glock-g34-gen-4-precision-9mm-competition-defense-pistol/UCDSUOVNp)
- [Glock G34 Gen 4 Elite 9mm: Precision Competition & Carry Pistol](https://gunsnation.com/p/glock-g34-gen-4-elite-9mm-precision-competition-carry-pistol/UCDSUNha2)
- [Glock G40 Gen 4 MOS 10mm - Precision Optic-Ready Powerhouse](https://gunsnation.com/p/glock-g40-gen-4-mos-10mm-precision-optic-ready-powerhouse/UCDSUKghS)

---
*Data from [GunsNation](https://gunsnation.com)*