5 Umarex Uzi Co2 of 2026 For Leak-Free Cycling

1

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

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• ARS Mark

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  9.6
• Brand
  Umarex

Key specs2

Gas Capsule Capacity

12 grams

Valve Cleanliness

Formulated to deliver clean carbon dioxide without leaving gummy debris on internal puncture needles or valve seats.

Pros & cons32

Pros

• Clean gas formulation helps keep airgun valve seats free from fouling deposits
• Standard 12-gram size matches the chamber requirements of 12g CO2 airguns
• Supplied in a two-bundle pack to supply extended target plinking sessions

Cons

• Usable shot count per capsule varies depending on the specific airgun valve setup
• Listing does not include silicone lubricant oil to protect internal puncture seals

2

Umarex ReadyAIR Gen 2 Portable High Pressure Air Compressor Pump

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  9.6
• Brand
  Umarex

Key specs1

Powerplant Compatibility

Built exclusively for high-pressure PCP pneumatic airguns and cannot fill or power standard CO2 replica platforms.

Pros & cons32

Pros

• Engineered specifically for filling pre-charged pneumatic PCP airguns directly
• Portable format allows recharging compatible PCP air reservoirs away from home
• Eliminates manual hand-pumping effort for high-pressure pneumatic air tanks

Cons

• Incompatible with standard 12g CO2 replica airguns and disposable CO2 valves
• Cannot be used to recharge disposable 12g CO2 capsules safely

3

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

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• ARS Mark

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  9.4
• Brand
  Umarex

Key specs2

Cartridge Quantity

12 capsules

Replica Compatibility

Designed for standard 12g CO2 pellet guns, BB guns, and airsoft replicas requiring disposable capsules.

Pros & cons32

Pros

• Standard 12-gram capsule size fits standard CO2 magazines and grip housings
• High-grade gas formulation prevents valve contamination during cycling
• Compact 12-pack is convenient to store in shooting bags or range cases

Cons

• Pack of 12 empties quickly during rapid semi-automatic shooting sessions
• Temperature drops during rapid fire can reduce velocity between shots

4

Umarex NitroAir Prefilled Nitrogen Cartridges for N2-Powered Airguns, Pack of

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  9.4
• Brand
  Umarex

Key specs2

Operating Pressure

3,600 PSI

Gas Safety Warning

Contains 32g of compressed nitrogen at 3,600 PSI. Not compatible with CO2 airguns, which operate at much lower pressures.

Pros & cons32

Pros

• High-pressure 3,600 PSI nitrogen charge provides consistent power in N2-rated airguns
• Can remain installed in compatible N2 airguns during storage without ruining seals
• Inset piercing face mechanically prevents insertion into low-pressure CO2 airguns

Cons

• Strictly prohibited for CO2 airguns due to extreme 3,600 PSI operating pressures
• Requires using a dedicated airgun bleeding mechanism before removing spent cylinders

5

Umarex CO2 Adapter for AirJavelin Arrow Gun

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  9.0
• Brand
  Umarex

Key specs2

Intended Platform

Umarex AirJavelin

Adapter Role

Serves as an adapter for AirJavelin arrow guns rather than a power source or magazine replacement for Uzi replicas.

Pros & cons32

Pros

• Adapts specific CO2 platforms like the AirJavelin arrow gun to standard CO2 capsules
• Provides a dedicated mechanical interface for gas transfer on compatible air arms
• Factory Umarex construction ensures exact thread engagement on designated models

Cons

• Built specifically for the AirJavelin platform and does not fit Uzi CO2 magazines
• Requires verification of gun threading and receiver clearance before purchase

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

What size CO2 cartridge does the Umarex Uzi use?

The replica uses standard 12-gram CO2 cartridges. Clean capsules, like silver Umarex 12-gram cartridges (size 12.7 mm, part number HU-XI-201), provide the correct neck profile to seat flush against the magazine piercing pin. Selecting cartridges formulated clean so they do not dirty air gun valves keeps the bolt cycling cleanly during rapid backyard shooting with a CO2 BB gun.

Can I use prefilled NitroAir nitrogen cartridges in my Umarex Uzi?

No. Umarex NitroAir cartridges are built strictly for N2-designated airguns such as the Umarex Komplete NCR PCP rifle. Each NitroAir capsule contains 32 grams of nitrogen compressed to 3,600 psi. Loading a 3,600 psi nitrogen cylinder into a valve system engineered for liquid CO2 can cause catastrophic seal failure and destroy your gun.

How do I stop gas from venting out when piercing a fresh cartridge?

Turn the piercing screw smoothly and decisively until the pin punctures the tip and the seal locks completely. Pausing halfway lets escaping gas freeze the main seal, creating immediate leaks and dumping pressure. Check your magazine manual to verify whether your puncture screw uses an integrated folding tab or an external hex key, and confirm the rubber face seal is seated flat and free of debris before loading a new capsule.

Can I recharge an empty Umarex Uzi magazine with a PCP compressor?

No. High-pressure air compressors like the Umarex ReadyAIR Gen 2 are made exclusively for filling PCP airguns and air rifles. Standard CO2 magazines lack the pressure ratings, burst discs, and fill probes required for high-pressure air pumps. If you want to shoot pre-charged pneumatic equipment, explore purpose-built tactical air rifle systems designed specifically for high-pressure air reservoirs.

Why is gas quality critical for maintaining semi-auto cycling?

Clean gas prevents particulate deposits and residue from coating your valve face and trigger mechanisms. Umarex specifies that its clean CO2 does not dirty your air gun valves, which helps preserve valve health and prevents sluggish bolt resets. Low-grade gas leaves residues that cause persistent hissing leaks around the valve stem, bleeding away the pressure needed to kick the blowback bolt back completely.

Does the Umarex AirJavelin CO2 adapter work in an Uzi magazine?

No. The Umarex CO2 adapter is engineered specifically for the AirJavelin arrow gun and does not fit replica submachine gun magazines. Blowback replicas require direct insertion of standard 12-gram capsules into the grip or removable stick magazine. Always check the exact model schematics and manual for your replica to confirm correct cartridge clearance before attempting to install external adapters.