11 Umarex Ghk Glock 17 Gen 5 of 2026 For Realistic Training

1

Glock 17 Gen 5 MOS Magazine for .177 Caliber BB

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• ARS Mark

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  10.0
• Brand
  Umarex

Key specs2

Magazine Type

Spare magazine (.177 BB)

Platform Match

Engineered specifically for the Umarex Glock 17 Gen 5 MOS steel BB air pistol. Check your pistol frame caliber before ordering because it will not feed 6mm airsoft BBs or .177 pellets.

Pros & cons32

Pros

• Direct fit for the Umarex Glock 17 Gen 5 MOS .177 caliber steel BB air pistol
• Drop-free design facilitates realistic tactical reload drills
• Dedicated metal build matches factory specifications for reliable feeding

Cons

• Incompatible with 6mm airsoft models or lead pellet variants
• Does not fit older Gen 3 or Gen 4 Glock airgun frames

2

Glock 17 Gen 5 MOS Half-Blowback 6mm BB Gun Airsoft

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  9.6
• Brand
  Umarex

Key specs3

Ammunition Caliber

6mm plastic airsoft BBs

Slide Cycling

Operates with a half-blowback slide action powered by a 12-gram CO2 cartridge. The slide cycles during fire but does not travel the full distance of a traditional gas blowback pistol.

Spare Magazine Part

2276342

Pros & cons43

Pros

• Factory optics cut accepts reflex sights directly via the MOS slide pattern
• Fires standard 6mm plastic airsoft BBs at velocities up to 320 FPS
• Drop-free magazine holds 14 rounds for realistic handling drills
• Gen 5 ergonomic frame styling matches real-steel dimensions for holster fit

Cons

• Half-blowback action provides less felt slide recoil than full gas blowback systems
• Magazine capacity is limited to 14 plastic BBs
• CO2 cartridge requires proper seating to prevent seal damage

3

T4E Glock G17 Gen 5 .43 Caliber Paintball Marker Magazine,

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  9.0
• Brand
  T4E

Key specs2

Marker Compatibility

Built exclusively for T4E Glock 17 Gen 5 training markers (models 2292166 and 2292167). It chambers .43 caliber chalk, powder, or paintballs and cannot be used with BB pistols.

Piercing Mechanism

Tool-free bottom impact puncture

Pros & cons42

Pros

• Accommodates 8 rounds of either .43 caliber paintballs or powder balls
• Tool-free CO2 compartment allows fast 12-gram cartridge swaps in the field
• Quick-piercing mechanism activates CO2 with a light tap on the baseplate
• Directly compatible with T4E Glock G17 Gen 5 markers 2292166 and 2292167

Cons

• Strictly limited to .43 caliber T4E markers and will not fit airsoft or airguns
• Holds only 8 rounds before requiring a reload

4

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

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  8.6
• Brand
  Umarex

Key specs2

Frame Generation

Gen 4 frame with finger grooves

Duty Holster Fit

Features authentic Gen 4 Glock dimensions and official licensed markings. Fits standard aftermarket duty holsters molded for full-size Glock 17 handguns.

Pros & cons42

Pros

• Full metal slide delivers realistic blowback action during cycling
• Drop-out metal magazine holds 18 steel BBs alongside the 12-gram CO2 capsule
• Reaches muzzle velocities up to 320 FPS for backyard target shooting
• Authentic Gen 4 frame dimensions fit most aftermarket duty holsters

Cons

• Fires steel BBs only and cannot chamber lead pellets or 6mm airsoft rounds
• Lacks factory MOS slide cuts for direct red dot optic mounting

5

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

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  8.6
• Brand
  Umarex

Key specs2

Velocity Rating

Up to 365 FPS (.177 steel BB)

Slide Construction

Heavy metal slide cycles with blowback action over a Gen 3 polymer frame. Fixed Glock-style white dot sights are standard without an optics cut.

Pros & cons42

Pros

• Muzzle velocity reaches up to 365 FPS using .177 caliber steel BBs
• Full metal slide creates realistic blowback recoil impulse on every shot
• Drop-out metal magazine houses 18 BBs and the 12g CO2 cartridge
• Classic Gen 3 finger-groove frame fits standard Glock duty holsters

Cons

• Slide does not feature an optic cut for micro reflex sights
• Steel BB ammunition is unsafe for skirmish play against other shooters

6

Elite Force Glock 17 Gen5 GBB Blowback 6mm BB Pistol

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  8.6
• Brand
  Elite Force

Key specs2

Action Mechanism

Full gas blowback (GBB)

Training Application

Dedicated 6mm airsoft gas blowback pistol intended for skirmishes and force-on-force training. Safe for use against opponents wearing protective gear when shooting plastic BBs.

Pros & cons42

Pros

• Authentic gas blowback system provides full slide travel and realistic cycling
• Gen 5 ergonomic frame includes flared magwell and removed finger grooves
• Chambered for field-legal 6mm plastic BBs suitable for airsoft matches
• Officially licensed Glock markings mirror the duty sidearm aesthetic

Cons

• Does not accept .177 steel BBs or lead airgun pellets
• Optics readiness requires verifying slide configuration before mounting red dots

7

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

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  8.6
• Brand
  Umarex

Key specs2

Receiver Fit

Fits the Umarex Gen 3 Glock 17 blowback BB pistol. Does not seat properly in Gen 4 or Gen 5 MOS frames due to differences in magazine release geometry.

Ammo Spec

18 steel BBs (.177 caliber)

Pros & cons32

Pros

• Direct factory replacement for the Umarex Glock 17 Gen 3 blowback air pistol
• Houses both the 18 steel BBs and the 12g CO2 capsule in one solid metal unit
• Drop-out design allows realistic emergency and tactical reload repetitions

Cons

• Does not fit Gen 5 MOS frames due to revised baseplate and catch dimensions
• Restricted strictly to .177 steel BBs and will not load pellets or 6mm BBs

8

Glock 17 Gen 5 MOS Blowback .177 Caliber BB Gun

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  8.4
• Brand
  Umarex

Key specs2

Optic Mounting

Factory MOS slide cut is prepared for micro reflex sights. Delivers up to 360 FPS with .177 steel BBs, making it suitable for backyard target practice with red dots.

Replacement Magazine Part

Part number 2255220

Pros & cons42

Pros

• Factory MOS slide cut accepts pistol-style reflex sights for fast target pickup
• Full blowback action simulates slide cycling with velocities up to 360 FPS
• Drop-free metal magazine accommodates 18 steel BBs and a 12-gram CO2 capsule
• Gen 5 frame ergonomics feature ambidextrous slide stops and no finger grooves

Cons

• Steel BBs will ricochet on hard targets and cannot be used in airsoft games
• Optic mounting plates and reflex sights must be purchased separately

9

Glock 19 Gen 5 MOS .177 Caliber BB Gun Pistol

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  8.2
• Brand
  Umarex

Key specs3

Included Optics Plates

4 adapter plates included

Compact Frame Profile

Built to compact Glock 19 Gen 5 dimensions rather than the full-size Glock 17. Includes 4 modular optic adapter plates to fit common reflex sight footprints.

Spare Magazine Part Number

2255231

Pros & cons42

Pros

• Includes 4 factory optics plates to mount nearly any micro red dot
• Compact Glock 19 dimensions offer realistic concealed-carry holster training
• Integrated front rail accommodates tactical weapon lights and laser units
• Drop-free 17-round magazine stores both .177 steel BBs and the 12g CO2 cylinder

Cons

• Compact Glock 19 frame will not fit holsters molded specifically for Glock 17
• Velocity peaks at 330 FPS, slightly below full-size Gen 5 BB models

10

Umarex GLOCK 17 Gen 5 21-Round Magazine for Blowback .177

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  6.6
• Brand
  Umarex

Key specs2

Pellet Capacity

21 rounds (.177 pellet)

Feeding System

Uses an internal belt track designed strictly for .177 caliber pellets. Will not function in steel BB guns or airsoft variants.

Pros & cons32

Pros

• High-capacity rotary belt holds 21 lead or alloy .177 caliber pellets
• Houses the 12g CO2 power source directly inside the full-size magazine body
• Enables realistic semi-automatic target shooting with rifled-barrel pistols

Cons

• Will not fit or feed steel BB pistols or 6mm airsoft Glock models
• Pellet seating in the belt requires deliberate loading compared to spring BBs

11

Glock 17 Gen 5 MOS .177 Caliber BB Gun Pistol

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  4.0
• Brand
  Umarex

Key specs2

Frame Generation Match

Matches the Gen 5 MOS .177 BB air pistol frame geometry. Confirm your pistol is the Gen 5 MOS BB model before buying to ensure proper latching.

Power Supply

12g CO2 cartridge housing

Pros & cons32

Pros

• Factory-spec replacement magazine for the Glock 17 Gen 5 MOS BB pistol
• Full-size drop-free metal housing allows smooth tactical reloading drills
• Integrated CO2 compartment holds a standard 12-gram cartridge

Cons

• Designed exclusively for .177 steel BBs and cannot chamber airsoft 6mm BBs
• Baseplate profile does not seat properly in Gen 3 or Gen 4 airgun frames

Last update on 2026-10-08 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

Is the Umarex Glock 17 Gen 5 a 6mm airsoft gun or a .177 steel BB pistol?

It depends on the exact version you pick, because Umarex produces Gen 5 replicas across entirely separate calibers and shooting platforms. The lineup includes the Elite Force Glock 17 Gen 5 GBB blowback 6mm BB airsoft pistol for tactical force-on-force skirmishes, alongside the Glock 17 Gen 5 MOS blowback .177 caliber BB gun pistol for steel-target practice. There are also dedicated .177 pellet variants and .43 caliber paintball markers carrying the Glock 17 Gen 5 branding. Always confirm the ammunition caliber and project type indicated on the packaging before ordering so you do not end up with an incompatible platform.

Does the slide deliver full blowback action or half-blowback?

Slide cycling stroke depends on whether the specific replica is built with a full gas blowback action or a half-blowback system. Standard blowback models, including the Glock 17 Gen 5 MOS .177 caliber BB pistol, cycle realistically along the frame during firing. However, alternate versions like the Glock 17 Gen 5 MOS half-blowback 6mm BB airsoft pistol feature a shorter cycling travel designed to conserve propellant. If your holster work and weapon-manipulation drills require full slide travel and authentic slide-lock handling, check the product specifications to confirm full blowback operation rather than half-blowback.

Which spare magazines fit the Glock 17 Gen 5 frame?

Magazines are strictly caliber-specific and will not interchange across airsoft, steel BB, and pellet frames. A Glock 17 Gen 5 MOS magazine for a .177 caliber steel BB pistol cannot feed or latch properly inside a 6mm airsoft frame, nor can it accept ammunition from the Umarex Glock 17 Gen 5 21-round magazine engineered for blowback .177 caliber pellet pistols. Marker platforms also demand their own dedicated hardware, such as the T4E Glock G17 Gen 5 magazine (part number 2292169), which holds an 8-round payload of .43 caliber paint or powder balls. Review your pistol caliber carefully, or inspect a dedicated CO2 BB gun for realistic training and plinking to confirm magazine compatibility before ordering spares.

Can you mount a red dot reflex optic on the slide?

Optics can only be mounted directly if the slide is an official Glock MOS (Modular Optics System) configuration. Factory versions like the Glock 17 Gen 5 MOS blowback .177 caliber BB gun pistol and the Gen 5 MOS 6mm airsoft model are optics ready to accept a pistol-style reflex sight out of the box. Standard non-MOS Glock 17 slides feature solid metal tops with fixed iron sights and lack the factory milled cutout required for adapter plates. If mounting a micro red dot is mandatory for your training setup in 2026, verify that the product title explicitly carries the MOS designation.

Can you fire lead pellets from a steel BB Glock 17 Gen 5?

No, you cannot load lead pellets into a smoothbore .177 steel BB pistol. Steel BB airguns utilize internal feed ramps and inline spring tracks sized strictly for spherical steel shot, which will deform or crush softer lead pellets. Umarex manufactures a separate blowback .177 caliber pellet air pistol that relies on a specialized Umarex Glock 17 Gen 5 21-round magazine designed specifically for skirted pellets. Attempting to force pellets into a steel BB magazine will cause persistent feeding jams and can damage the internal gas seals.

What power source does the Umarex Glock 17 blowback series use?

Most airgun and training marker variants rely on standard 12-gram CO2 cartridges to cycle the slide and propel your shots. Both the 18-shot .177 caliber BB air pistols and the T4E Glock G17 Gen 5 marker operate on a single 12-gram CO2 cartridge. In the T4E magazine, that 12-gram CO2 cartridge accommodates swaps without tools in seconds when on the field. Airsoft models under the Elite Force line can utilize green gas or CO2 depending on the magazine valve design, so verify the fuel system on your exact model before stocking up on propellant.