Umarex Glock 17 Gen 4 Green Gas Best 2026 Pick

1

Umarex T4E Walther PPQ .43 Caliber Training Pistol Paintball Gun

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• ARS Mark

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  9.2
• Brand
  Umarex

Key specs2

Ammunition Versatility

Fires .43 caliber paintballs, powder balls, and rubber balls for tactical drills, unlike standard .177 steel BB replicas.

Slide Operation

Metal slide locks open on empty

Pros & cons53

Pros

• Fires .43 caliber paintballs, powder balls, or rubber balls at up to 355 FPS
• Slide catch locks open upon emptying the 8-round drop-free magazine
• Features an adjustable rear sight with visible yellow dots for clear target alignment
• Picatinny accessory rail allows mounting standard tactical lights or lasers
• Fits duty holsters for realistic engagement and force-on-force drills

Cons

• Uses .43 caliber markers rather than standard .177 steel BBs or 6mm airsoft rounds
• 8-round magazine capacity is significantly lower than typical BB air pistols
• CO2 cartridges are not included and must be purchased separately

2

Glock 19 Gen3 .177 Caliber BB Gun Air Pistol

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  8.8
• Brand
  Umarex

Key specs2

Muzzle Velocity

Up to 410 FPS

Accessory Mounting

Integrated Weaver rail accepts compatible tactical lights and laser units beneath the barrel.

Pros & cons43

Pros

• Delivers velocities up to 410 FPS using standard 12-gram CO2 cartridges
• Officially licensed Glock markings and authentic fixed Glock-style sights
• Integrated Weaver rail accommodates standard tactical accessories
• Holds 15 steel BBs in a compact frame weighing 1.6 pounds

Cons

• Lacks blowback slide cycling for realistic recoil simulation
• Powered strictly by 12-gram CO2 rather than refillable green gas
• 12-gram CO2 power source is not included in the package

3

Glock 19X Gen5 .177 Caliber BB Gun Air Pistol, Black

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• ARS Mark

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  8.8
• Brand
  Umarex

Key specs2

Slide Action

Full metal slide with blowback

Magazine Mechanism

Features an 18-round drop-free magazine designed for fast semi-automatic reloading practice.

Pros & cons43

Pros

• Realistic blowback action cycles the full metal slide with each trigger pull
• 18-round drop-free magazine supports rapid reloading drills
• Semi-automatic repeater action chambered for .177 caliber steel BBs
• Distinctive Glock 19X styling with full metal slide construction

Cons

• Listing shows color as Tan despite the title indicating Black
• Maximum muzzle velocity is unlisted in the provided specifications
• Propellant type is not explicitly specified in the product data

4

Umarex GLOCK 17 Blowback .177 Caliber BB Gun Air Pistol,

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  8.6
• Brand
  Umarex

Key specs2

Duty Holster Fit

Fits most aftermarket duty holsters

Gen3 Power Source

Operates on standard 12-gram CO2 cartridges rather than green gas to reach up to 365 FPS.

Pros & cons43

Pros

• Authentic blowback action cycles a full metal slide with realistic controls
• Fits most aftermarket duty holsters for authentic draw practice
• Fires .177 caliber steel BBs at velocities up to 365 FPS
• Drop-out metal magazine holds 18 rounds alongside realistic Glock markings

Cons

• Runs on 12-gram CO2 cartridges rather than green gas canisters
• Requires purchasing 12-gram CO2 cartridges separately
• Gen3 grip profile lacks the interchangeable backstrap system of later generations

5

GLOCK 17 Blowback .177 Caliber BB Gun Air Pistol, Gen4

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• ARS Mark

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  8.6
• Brand
  Umarex

Key specs2

Gen4 Configuration

Replicates the Glock 17 Gen4 platform with a full metal blowback slide and standard duty holster compatibility.

Propellant Verification

12-gram CO2 powered (not green gas)

Pros & cons43

Pros

• Exact Gen4 styling with realistic blowback action and full metal slide
• Fits most aftermarket duty holsters for true-to-life holster practice
• Drop-out metal magazine houses 18 steel BBs and realistic functional controls
• Features authentic Glock-style fixed sights and licensed trademarks

Cons

• Requires 12-gram CO2 cartridges and does not accept green gas
• Max velocity of 320 FPS is lower than the 365 FPS Gen3 model
• CO2 cartridges are not included with the pistol

6

Umarex XBG .177 Caliber BB Gun Air Pistol , Black

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  8.4
• Brand
  Umarex

Key specs1

Unstated Specifications

• Verify whether power is 12g CO2 or spring
• Confirm magazine capacity before purchasing
• Check whether slide is fixed or blowback

Pros & cons33

Pros

• Chambered in standard .177 caliber for affordable steel BB plinking
• Compact lightweight handgun footprint from Umarex
• Finished in matte black for a clean tactical profile

Cons

• Power source and magazine capacity are unstated and must be verified
• Maximum muzzle velocity is omitted from manufacturer specifications
• Blowback action and slide material are unspecified in listing data

7

Smith & Wesson M&P 40 .177 Caliber BB Gun Air

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  8.4
• Brand
  Umarex

Key specs2

Targeting Sights

Fiber optic open sights

Grip Power Design

Houses a single 12-gram CO2 cartridge inside the Dark Earth Brown grip to launch 19 BBs at up to 410 FPS.

Pros & cons53

Pros

• Shoots .177 caliber steel BBs at speeds up to 410 FPS
• High-capacity 19-shot drop-free magazine allows extended target sessions
• Bright fiber optic sights enhance rapid target acquisition
• Built-in accessory rail accommodates weapon lights and targeting lasers
• Manual safety switch provides clear control over firing status

Cons

• Fixed slide mechanism provides standard action without blowback recoil
• Uses 12-gram CO2 cartridges housed in the grip rather than green gas
• CO2 cylinders must be purchased separately

Last update on 2026-09-19 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

Does the Umarex Glock 17 Gen 4 use green gas or 12-gram CO2?

The Umarex Glock 17 Gen 4 BB air pistol is powered by a 12-gram CO2 cartridge, not green gas. The manufacturer specifications state that CO2 is not included in the package, so you must supply your own 12-gram cylinders. Attempting to charge this model with green gas canisters will not work because the puncture magazine requires a sealed 12-gram CO2 cartridge to seat and pierce properly.

Is the Umarex Glock 17 Gen 4 a .177 BB gun or a 6mm airsoft replica?

This replica is an 18-shot, .177 caliber BB air pistol designed strictly for steel BBs. It does not fire 6mm plastic airsoft BBs or lead airgun pellets. Loading soft airsoft ammo or oversized pellets into the .177 caliber magazine can cause severe feeding jams. If your training requires distinct platforms, check alternatives such as the Umarex Glock blank gun to ensure you match the correct ammunition to your intended practice.

Does the Umarex Glock 17 Gen 4 have realistic blowback action?

Yes, the Umarex Glock 17 Gen 4 features realistic blowback action driven by its 12-gram CO2 system. Every trigger pull discharges a .177 caliber BB and directs gas rearward to cycle the slide, simulating the slide action of an authentic firearm. This mechanical cycle creates authentic handling habits during rapid target transitions.

How many rounds does the Umarex Glock 17 Gen 4 magazine hold?

The drop-out magazine holds 18 rounds of .177 caliber BBs alongside the 12-gram CO2 power source. Having an 18-shot capacity allows for sustained shooting strings before you need to reload. To keep reloads smooth, inspect the magazine follower regularly and verify that you load only undamaged .177 caliber steel BBs.

Will the Umarex Glock 17 Gen 4 fit standard duty holsters?

Holster fit depends on your specific holster molding and retention hardware. The Umarex Glock 17 Gen 4 has listed dimensions of 3.25 x 10.5 x 9.75 inches and weighs 1 pound. While it replicates standard Glock Gen4 frame contours, slight dimensional variances across airgun molds can create tight fits in rigid Kydex duty holsters. Check your holster retention screw adjustments and verify slide clearance before holstering.

What supplies are required to shoot the Umarex Glock 17 Gen 4 out of the box?

You need standard 12-gram CO2 cartridges and .177 caliber steel BBs, because the pistol does not include CO2 in the box. Ordering green gas instead of 12-gram CO2 cartridges will leave you unable to pressurize the replica. Always check the package contents on the product listing and verify you have compatible 12-gram CO2 cylinders ready before your first shooting session.