9 Umarex Glock 17 Gen 5 Co2 Pellet Pistol of 2026 For Realistic Training

1

Beretta 92A1 CO2 Full Auto BB Pistol air Pistol

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• ARS Mark

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  9.4
• Brand
  Beretta

Key specs2

Firing Modes

Semi-automatic and full-automatic

Ammunition Type

Chambered strictly for .177 steel BBs; does not fire lead pellets or utilize a rifled barrel.

Pros & cons42

Pros

• Selectable full-auto and semi-automatic firing modes for varied training drills
• Realistic blowback action simulates slide recoil during rapid shooting strings
• Drop-out metal magazine holds 18 rounds of .177 caliber steel BBs
• Covered by a one-year limited warranty from the manufacturer

Cons

• Smoothbore design fires steel BBs rather than rifled .177 pellets
• Maximum velocity is rated at 330 FPS, which is lower than comparable BB pistols

2

Crosman 5-Count CO2 Cartridges For Air Rifles And Air Pistols

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  9.2
• Brand
  Crosman

Key specs2

Cartridge Size

Standard 12-gram non-threaded

Valve Compatibility

Engineered to seat tightly into standard CO2 airgun valves to minimize gas loss upon piercing.

Pros & cons32

Pros

• Snug seal neck profile helps minimize gas leaks upon valve piercing
• Standard 12-gram size fits most CO2-powered airguns and replica pistols
• Compact 5-count pack offers an affordable supply for short shooting drills

Cons

• Small 5-pack runs out rapidly when running heavy blowback pistols
• Sustained rapid firing causes cartridge cooling and velocity drop

3

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

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  9.0
• Brand
  T4E

Key specs2

Marker Compatibility

Fits GLOCK G17 Gen5 paintball markers 2292166 and 2292167, but cannot feed .177 pellets or airguns.

CO2 Piercing Method

Toolless bottom-impact piercing

Pros & cons42

Pros

• Quick-piercing base punctures 12g CO2 cartridges with a light tap
• Tool-free cartridge changes let you reload CO2 quickly at the bench
• Holds 8 rounds of either .43 caliber paintballs or powder balls
• Built to official Glock Gen 5 external dimensions for realistic handling

Cons

• Fits .43 caliber paintball markers only and cannot feed .177 pellets
• 8-round capacity requires frequent reloads compared to 21-round pellet mags

4

Umarex .177 Caliber Pellet Air Gun Rotary Magazine (Pack of

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  9.0
• Brand
  Umarex

Key specs2

Rotary Fitment

Designed for Umarex Walther, Beretta, Colt, HK, and S&W rotary pellet pistols, not Glock stick-style mags.

Clip Capacity

8 rounds per rotary cylinder

Pros & cons32

Pros

• Precision-machined aluminum construction in Germany resists wear
• Three-pack bundle provides 24 total pre-loadable shots between drills
• Built specifically to cycle standard .177 caliber lead pellets

Cons

• Rotary cylinder format is incompatible with Glock 17 air pistols
• 8-shot wheel design requires frequent swapping during target practice

5

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

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  8.6
• Brand
  Umarex

Key specs2

Muzzle Velocity

Up to 365 FPS with steel BBs

Holster Fit

Molded to authentic Glock 17 dimensions to fit most standard duty holsters for tactical drills.

Pros & cons42

Pros

• Authentic Gen3 Glock markings, drop-out magazine, and metal slide
• Realistic blowback action delivers authentic slide movement on each trigger pull
• Fires .177 steel BBs at factory-listed velocities up to 365 FPS
• Matches real Glock 17 dimensions to fit standard duty holsters

Cons

• Fires steel BBs only and cannot chamber or stabilize .177 pellets
• Gen3 finger-groove grip design lacks Gen5 ambidextrous frame updates

6

Gamo 611139354 C-15 Bone Collector Pellet/BB Pistol

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  7.6
• Brand
  Gamo

Key specs1

Ammunition Flexibility

Dual-fuel design accepts either .177 pellets or steel BBs depending on your target practice needs.

Pros & cons32

Pros

• Dual-ammo capability allows shooting both .177 pellets and steel BBs
• Compact semi-automatic pistol profile suited for backyard target drills
• Official Gamo Bone Collector styling for replica collectors

Cons

• Non-Glock grip angle and frame dimensions will not match Glock holster rigs
• Magazine capacity and velocity ratings are unlisted and must be verified

7

Elite Force Umarex 2276320 Airsoft Accessories Magazines

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  7.6
• Brand
  Elite Force

Key specs1

Airsoft Platform

Dedicated to 6mm airsoft replicas; not compatible with .177 pellet or steel BB airguns.

Pros & cons32

Pros

• Authentic Elite Force Umarex OEM replacement magazine quality
• Metal construction provides realistic weight and handling in training
• Designed specifically for compatible airsoft gas blowback platforms

Cons

• Feeds 6mm airsoft BBs and is completely incompatible with .177 pellets
• Specific gun model compatibility and shot count must be verified before buying

8

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

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  6.6
• Brand
  Umarex

Key specs2

Pellet Magazine Capacity

21 rounds (.177 caliber pellets)

Gen 5 Compatibility

Specifically designed for the Umarex Glock 17 Gen 5 pellet blowback pistol, bypassing smoothbore BB clips.

Pros & cons42

Pros

• Generous 21-round capacity designed specifically for .177 lead pellets
• Direct OEM fit for the Umarex Glock 17 Gen 5 blowback pellet pistol
• Belt-driven pellet mechanism feeds rounds reliably through the rifled barrel
• Authentic black finish blends seamlessly with the Gen 5 Glock grip

Cons

• Will not fit Gen 3 or Gen 4 Glock BB pistols or rotary-magazine airguns
• Requires keeping pellet overall length within factory limits to avoid jams

9

Double Bell 22 Round CO2 Airsoft Magazine for G17 Airsoft

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  5.0
• Brand
  GoldenBall

Key specs2

Airsoft Mag Capacity

22 rounds (6mm airsoft BBs)

Power Source Fit

Houses a standard 12g CO2 cartridge inside a full metal body for G17 airsoft platforms.

Pros & cons32

Pros

• Durable full-metal frame construction withstands repeated training drops
• High-tension internal spring provides steady feeding of 22 rounds
• Holds a standard 12g CO2 cartridge inside the drop-out magazine body

Cons

• Sized for 6mm plastic airsoft BBs, not .177 pellets or steel BBs
• Internal gas release valve is tuned specifically for airsoft pistol slides

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

Does the Umarex Glock 17 Gen 5 pellet pistol shoot .177 pellets or steel BBs?

This air pistol is engineered specifically to shoot .177 caliber pellets rather than steel BBs. It relies on the dedicated Umarex GLOCK 17 Gen 5 21-Round Magazine for Blowback .177 Caliber Pellet Gun Air Pistols to seat and feed lead ammunition properly. While shooters looking for smoothbore plinking often choose CO2 BB guns like the 18-shot Umarex GLOCK 17 Gen3 blowback air pistol, loading steel shot into this rifled Gen 5 pellet system can damage the barrel. Always confirm your ammunition tin specifies .177 caliber pellets before loading.

Which spare magazine fits the Gen 5 blowback pellet pistol?

You must use the Umarex GLOCK 17 Gen 5 21-Round Magazine made specifically for the blowback .177 caliber pellet gun air pistol. Glock frames share similar exterior dimensions across different recreational platforms, which causes widespread confusion. For example, the T4E Glock G17 Gen 5 marker uses an 8-round magazine built exclusively for .43 caliber paint or powder balls, while airsoft versions use 22-round airsoft magazines. Check the manufacturer packaging to confirm you are buying the 21-round .177 pellet magazine rather than an airsoft or paintball clip.

Can I use standard 12-gram CO2 cartridges in this magazine?

Yes, standard 12-gram CO2 cartridges fit the magazine and supply the gas pressure needed for semi-automatic shooting. Metal 12-gram cartridges, such as Crosman Powerlets, eliminate manual pumping between shots and fit into the internal valve chamber. When the cartridge is pierced, it forms a tight seal against the valve assembly to prevent gas leaks and maintain consistent pressure behind each .177 pellet. Keep extra cartridges on hand so you can swap out depleted power sources during extended shooting drills.

Can I use 8-shot Umarex rotary pellet magazines in the Glock 17 Gen 5?

No, standard Umarex 8-shot rotary pellet magazines will not fit or function in the Glock 17 Gen 5. Those circular silver magazines are made for different .177 caliber pellet pistols, including the Walther CP88, CP88 Competition, CP99, PPQ, Beretta M 92 FS, Colt Government Model 1911 A1, and HK P30. The Gen 5 Glock relies on a dedicated 21-round drop-free magazine with an internal belt drive rather than a rotary cylinder. If you want alternative setups with different feeding systems, compare options among tactical air rifles and multi-shot pistols before buying spare parts.

Will Glock 17 Gen 3 airgun magazines work in the Gen 5 pellet pistol?

No, Gen 3 air pistol magazines are completely incompatible with the Gen 5 pellet pistol. The Umarex GLOCK 17 Gen3 blowback model is an 18-shot BB gun designed specifically for round steel shot. Its internal feed channel and gas valve layout cannot accommodate or cycle .177 pellets. Inserting a Gen 3 BB magazine into a Gen 5 pellet gun will prevent the magazine from locking into place and cause feeding failures.

How do you prevent CO2 gas leaks when loading the magazine?

Insert the 12-gram CO2 cartridge straight into the magazine housing so the tip centers perfectly against the piercing pin. Tighten the base screw smoothly and firmly without hesitating. Crosman 12-gram metal cartridges are sized to create a snug seal against the internal valve assembly the moment the seal punctures, containing the pressure. If you tighten the screw too slowly or seat the cartridge off-center, gas will vent past the seal and drain the charge before you can shoot.