12 Umarex Glock Co2 Magazine of 2026 For Exact Model Fit

1

POLE.CRAFT Magazine Holster for Glock,IWB/OWB Kydex Mag Holder - 9mm/.40

View on Amazon

• ARS Mark

  ARS Mark is a ranking system developed by bestairriflescopes.com. ARS Mark has no relationship or impact from any manufacturers or sales agent websites. Learn more

  8.2
• Brand
  POLE.CRAFT

Key specs2

Holster Fitment

Fits 9mm and .40 double stack Glock magazines

Carry Orientation

IWB and OWB belt clip configuration

Pros & cons32

Pros

• Kydex construction allows both inside-the-waistband and outside-the-waistband belt carry
• Accommodates double stack magazines across Glock 17, 19, 19X, and other listed frame sizes
• Provides rigid magazine retention for smooth draws during range practice drills

Cons

• Designed for firearm magazines rather than slim airgun stick magazines
• Retention tension must be verified manually to match specific airgun magazine dimensions

2

Glock 19 GEN5 .177 BB Pistol 15-Round Drop-Free CO2 Stick

View on Amazon

• ARS Mark

  ARS Mark is a ranking system developed by bestairriflescopes.com. ARS Mark has no relationship or impact from any manufacturers or sales agent websites. Learn more

  8.2
• Brand
  Umarex

Key specs2

Magazine Architecture

15-round drop-free stick magazine

Caliber and Frame Match

Built specifically for Umarex Glock 19 Gen 5 air pistols shooting .177 steel BBs.

Pros & cons32

Pros

• Slim stick design provides a compact 15-round capacity for Glock 19 Gen 5 replicas
• Drop-free release allows quick magazine swaps during target shooting
• Engineered specifically for smooth feeding of .177 caliber steel BBs

Cons

• Requires confirming whether your Glock 19 Gen 5 pistol uses stick mags or full-size CO2 housings
• Does not house the 12-gram CO2 cartridge inside the magazine body

3

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

View on Amazon

• ARS Mark

  ARS Mark is a ranking system developed by bestairriflescopes.com. ARS Mark has no relationship or impact from any manufacturers or sales agent websites. Learn more

  9.6
• Brand
  Umarex

Key specs2

Blowback Compatibility

Requires the Umarex Glock 17 Gen 3 blowback frame with matching internal gas router.

Ammunition Type

.177 caliber steel BBs

Pros & cons32

Pros

• Full-size magazine body matches authentic Glock 17 frame dimensions
• Houses the 12g CO2 capsule inside the drop-free magazine assembly
• Built specifically for blowback action on licensed Umarex Glock 17 Gen 3 BB pistols

Cons

• Will not latch or feed properly inside non-blowback or newer Gen 4 and Gen 5 frames
• Limited strictly to .177 caliber steel BBs and cannot chamber 6mm airsoft pellets

4

Glock 19 Gen3 6mm BB Pistol Airsoft Gun Magazine, 11-Round

View on Amazon

• ARS Mark

  ARS Mark is a ranking system developed by bestairriflescopes.com. ARS Mark has no relationship or impact from any manufacturers or sales agent websites. Learn more

  7.8
• Brand
  Elite Force

Key specs2

Airsoft Generation Fit

Seats inside Elite Force Glock 19 Gen 3 frames using standard 6mm plastic BBs.

Capacity Specification

11 rounds

Pros & cons32

Pros

• Dedicated feed lips designed specifically for 6mm airsoft ammunition
• Compact magazine profile matches standard Glock 19 Gen 3 grip dimensions
• Licensed Elite Force construction ensures reliable seating in Gen 3 airsoft pistols

Cons

• Carries an 11-round capacity, which is lower than larger airsoft and BB magazines
• Incompatible with .177 steel BB airguns and newer Gen 4 or Gen 5 frames

5

Elite Force Umarex 2276320 Airsoft Accessories Magazines

View on Amazon

• ARS Mark

  ARS Mark is a ranking system developed by bestairriflescopes.com. ARS Mark has no relationship or impact from any manufacturers or sales agent websites. Learn more

  9.1
• Brand
  Elite Force

Key specs2

Part Number Verification

Umarex Elite Force part 2276320

Model Confirmation Requirement

Check your pistol manual against part 2276320 to verify exact caliber and frame match.

Pros & cons32

Pros

• Official Umarex and Elite Force production ensures exact factory build standards
• Authentic magazine body fits dedicated Elite Force airsoft platforms
• Designed for smooth BB feeding in compatible airsoft pistol frames

Cons

• Product listing leaves specific Glock frame generation and round capacity unstated
• Requires verifying pistol model numbers and propellant type prior to purchase

6

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

View on Amazon

• ARS Mark

  ARS Mark is a ranking system developed by bestairriflescopes.com. ARS Mark has no relationship or impact from any manufacturers or sales agent websites. Learn more

  8.0
• Brand
  Umarex

Key specs2

Grip Geometry Fit

Matches the full-size frame and compact slide combination of the Glock 19X Gen 5.

Capacity Specification

18 rounds

Pros & cons32

Pros

• Holds 18 steel BBs for extended shooting sessions between reloads
• Factory replacement designed specifically for the Umarex Glock 19X Gen 5 BB pistol
• Houses both the .177 BB stack and the 12g CO2 cartridge in a single drop-free unit

Cons

• Full-size 19X baseplate will not seat inside standard compact Glock 19 grips
• Cannot be used with 6mm airsoft replicas or .43 caliber paintball markers

7

Umarex High-Grade CO2 Cartridges for Pellet Guns, BB Guns and

View on Amazon

• ARS Mark

  ARS Mark is a ranking system developed by bestairriflescopes.com. ARS Mark has no relationship or impact from any manufacturers or sales agent websites. Learn more

  7.3
• Brand
  Umarex

Key specs2

Propellant Format

12-gram non-threaded CO2 capsules

Package Contents

Pack of 12 cartridges

Pros & cons32

Pros

• Supplies 12 standard 12-gram CO2 capsules in a single package
• Universal fit across CO2-powered pellet guns, BB pistols, and airsoft magazines
• Precision neck profile seats cleanly against standard magazine puncture pins

Cons

• Consumable gas supply only, containing no magazine body or feeding mechanism
• Rapid firing causes temporary cartridge chill that drops velocity until warmed

8

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

View on Amazon

• ARS Mark

  ARS Mark is a ranking system developed by bestairriflescopes.com. ARS Mark has no relationship or impact from any manufacturers or sales agent websites. Learn more

  8.2
• Brand
  Umarex

Key specs2

Generation Fitment

Engineered specifically for Gen 4 Umarex Glock 17 blowback frames with dual-catch cuts.

Ammunition Type

.177 caliber steel BBs

Pros & cons32

Pros

• Engineered specifically for the Umarex Glock 17 Gen 4 blowback BB pistol
• Full-size drop-free magazine weight enhances authentic handling and reloads
• Contains the CO2 power source and .177 BB feed channel in one solid unit

Cons

• Gen 4 magazine cutouts will not properly latch into Gen 3 or Gen 5 pistol grips
• Puncture screw and internal valve seals must be kept lubricated to avoid CO2 leaks

9

Umarex Glock 19 Gen 5 .177 CO2 Air Pistol Magazine

View on Amazon

• ARS Mark

  ARS Mark is a ranking system developed by bestairriflescopes.com. ARS Mark has no relationship or impact from any manufacturers or sales agent websites. Learn more

  8.5
• Brand
  Umarex

Key specs2

Feed Specification

Supplies 17 steel BBs alongside an internal 12g CO2 chamber for Gen 5 Glock 19 frames.

Part Number Verification

Umarex part 2255231

Pros & cons32

Pros

• Carries 17 rounds of .177 steel BBs for the compact Glock 19 Gen 5 air pistol
• Self-contained CO2 housing powers blowback cycling and BB feeding
• Factory part number 2255231 guarantees correct magazine catch engagement

Cons

• Designed exclusively for Gen 5 models and will not lock into Gen 3 or Gen 4 frames
• Not compatible with 6mm plastic airsoft ammo or non-blowback variants

10

Glock 19 Gen 5 MOS Blowback BB Gun Airsoft Pistol

View on Amazon

• ARS Mark

  ARS Mark is a ranking system developed by bestairriflescopes.com. ARS Mark has no relationship or impact from any manufacturers or sales agent websites. Learn more

  7.7
• Brand
  Elite Force

Key specs2

MOS Platform Compatibility

Designed for Elite Force Glock 19 Gen 5 MOS blowback airsoft pistols shooting 6mm BBs.

Airsoft Generation Fit

Glock 19 Gen 5 MOS

Pros & cons32

Pros

• Tailored for the Elite Force Glock 19 Gen 5 MOS blowback airsoft pistol
• Feeds 6mm airsoft BBs smoothly through a dedicated feed lip assembly
• Drop-free configuration supports authentic optic-ready MOS reload drills

Cons

• Chambered only for 6mm airsoft ammunition and will not feed .177 steel BBs
• MOS baseplate dimensions must be checked against non-MOS Gen 5 grip openings

11

Glock 17 Gen 5 MOS .177 Caliber BB Gun Pistol

View on Amazon

• ARS Mark

  ARS Mark is a ranking system developed by bestairriflescopes.com. ARS Mark has no relationship or impact from any manufacturers or sales agent websites. Learn more

  8.2
• Brand
  Umarex

Key specs2

MOS Slide Alignment

Locks into Umarex Glock 17 Gen 5 MOS .177 BB airguns with correct valve alignment.

Magazine Architecture

Full-size drop-free CO2 housing

Pros & cons32

Pros

• Built specifically for the Umarex Glock 17 Gen 5 MOS .177 BB airgun
• Full-size housing provides reliable gas seal contact with the blowback slide
• Drop-free all-in-one design holds both the 12g CO2 cartridge and steel BBs

Cons

• Full-size Glock 17 length prevents it from locking into compact Glock 19 frames
• Incompatible with 6mm airsoft models or earlier Gen 3 and Gen 4 Glock 17 replicas

12

T4E Glock G17 Gen 5 .43 Caliber Paintball Marker Quick-Piercing

View on Amazon

• ARS Mark

  ARS Mark is a ranking system developed by bestairriflescopes.com. ARS Mark has no relationship or impact from any manufacturers or sales agent websites. Learn more

  7.9
• Brand
  T4E

Key specs2

Piercing Mechanism

Tool-free emergency quick-piercing base

Caliber and Frame Match

Designed strictly for T4E Glock 17 Gen 5 .43 caliber paintball and rubber ball markers.

Pros & cons32

Pros

• Emergency quick-piercing base punctures CO2 instantly with a bottom tap
• Feeds large .43 caliber paint, chalk, and rubber projectiles reliably
• Built to authentic Glock 17 Gen 5 dimensions for T4E training markers

Cons

• Chambered exclusively for .43 caliber ammo and will not accept .177 BBs or 6mm airsoft
• Quick-piercing valve mechanism requires routine silicone lubrication on seals

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

Does an Umarex Glock CO2 magazine fit across different replica generations?

No, replica generations generally require generation-specific magazines. Umarex manufactures distinct magazines for pistols such as the GLOCK 17 Gen3 blowback .177 BB pistol and the GLOCK 17 Gen4 blowback .177 BB pistol. Internal frame tolerances, slide catch engagement, and release notches differ between Gen3, Gen4, and Gen5 replicas. Always check the generation markings on your pistol frame and slide before selecting a replacement magazine.

How do I know whether a magazine feeds .177 steel BBs, 6mm airsoft, or .43 caliber rounds?

Check the caliber stamp on your replica slide and match it directly to the magazine product specifications. Umarex offers Glock magazines for .177 steel BB air pistols, 6mm plastic BB airsoft models like the 11-round Glock 19 Gen3 magazine, and .43 caliber paintball markers like the T4E Glock G17 Gen 5. A 6mm airsoft magazine or .43 marker magazine will not chamber or seal inside a dedicated .177 air pistol. If you use a CO2 BB gun for training and plinking, verify that the magazine is explicitly rated for .177 steel BBs.

Does every Umarex Glock magazine house the CO2 cartridge inside the magazine?

No, the location of the 12-gram CO2 capsule depends on the magazine design. Certain models, such as the Glock 19 GEN5 .177 BB pistol, use a 15-round drop-free stick magazine where the CO2 cartridge installs separately into the pistol grip. Other variants use full-size drop-free housings, such as the 17-round Glock 19 Gen 5 .177 magazine (part number 2255231) or the 18-shot Glock 19X Gen5 .177 magazine, which hold both the ammunition and the 12-gram CO2 cartridge together. Check your pistol manual to confirm whether your grip houses the puncture assembly or if you need an all-in-one magazine.

Can a Glock 17 CO2 magazine work inside a Glock 19 replica?

Generally no, because airgun magazines rely on exact shell dimensions and valve alignment rather than just grip width. Even though both share similar double-stack profiles in centerfire firearms, airgun variants have specific valve release heights, feed lips, and baseplate dimensions. A Glock 17 Gen 5 MOS .177 caliber magazine is built specifically for that slide and frame configuration. Inserting a Glock 17 magazine into a Glock 19 air pistol often fails to lock into the catch or misaligns with the blowback gas port.

What is the difference between standard airgun magazines and MOS or paintball marker magazines?

Optic-ready MOS replicas and paintball markers use internal components tailored to their distinct operating pressures and ammunition types. The Glock 17 Gen 5 MOS .177 BB magazine and Glock 19 Gen 5 MOS airsoft magazine align with the internal blowback units of factory MOS-cut slides. Meanwhile, the T4E Glock G17 Gen 5 magazine feeds .43 caliber paintballs and incorporates a quick-piercing CO2 mechanism in the base. If you run a specialized tactical training platform, confirm that the spare magazine matches your exact model variant rather than a standard non-MOS frame.

How do I prevent gas leaks when installing a CO2 cartridge in a drop-free magazine?

Seat the 12-gram CO2 cartridge straight into the magazine channel and tighten the piercing screw in one smooth, continuous motion. Cross-threading the screw or tightening it too slowly allows gas to escape around the neck seal, which can freeze and distort the rubber gasket. Avoid over-torquing the base screw once the puncture is sealed, as excessive force crushes the internal O-ring. For magazines with an integrated piercing mechanism, like the T4E Glock G17 Gen 5 .43 magazine, follow the specific instructions on the piercing cap to avoid damaging the internal valve.