One of the most common questions we hear at Nakestores is:
"Can I leave the CO₂ cartridge in my Byrna launcher?"
The answer depends on whether the CO₂ cartridge has been punctured or not. Understanding the difference can help extend the life of your launcher, maintain reliability, and ensure your Byrna is ready when you need it most.
The Good News: Byrna's Pull-Pierce Technology
Most modern Byrna launchers, including the Byrna CL, Byrna LE, Byrna SD, and Byrna CL-XL, feature Pull-Pierce Technology.
This means the CO₂ cartridge remains sealed inside the launcher until you pull the trigger for the first time. Simply inserting a fresh CO₂ cartridge does not puncture it.
Benefits of Pull-Pierce Technology
- Allows long-term storage with a fresh CO₂ cartridge installed.
- Prevents pressure from constantly being applied to internal seals.
- Helps preserve CO₂ power until needed.
- Keeps your launcher ready for emergencies.
Because the cartridge remains unpunctured, you can leave it installed in your launcher for extended periods without causing unnecessary wear.
What Happens After the CO₂ Is Punctured?
Once the trigger is pulled for the first time, the CO₂ cartridge is punctured and the launcher becomes pressurized.
At this point, the situation changes.
Leaving a punctured CO₂ cartridge inside the launcher for long periods can:
- Place constant pressure on internal seals.
- Increase wear on O-rings and sealing components.
- Potentially reduce long-term reliability.
- Increase the chance of a slow gas leak over time.
For this reason, Byrna recommends replacing punctured cartridges after use rather than storing the launcher indefinitely under pressure.
Should You Remove the CO₂ After Shooting?
If you have used your launcher and punctured the CO₂ cartridge, it is generally best to:
- Finish your training session.
- Remove the used cartridge.
- Install a fresh cartridge when returning the launcher to defensive-ready status.
This helps ensure maximum performance and reliability.
How Often Should You Replace Stored CO₂?
Even when using Pull-Pierce Technology, many experienced Byrna owners choose to periodically replace stored CO₂ cartridges as part of their maintenance routine.
A good practice is to:
- Inspect your launcher regularly.
- Check expiration dates on CO₂ cartridges.
- Replace emergency-use cartridges periodically.
- Perform occasional function checks and training sessions.
Use CO₂ Oil Cartridges for Maintenance
One of the easiest ways to extend the life of your Byrna launcher is by using a Byrna 8-Gram CO₂ Oil Cartridge.
These specialized cartridges release a small amount of lubricant through the launcher during firing and help condition internal seals.
At Nakestores, we recommend:
- Using approximately one oil cartridge after every box of regular CO₂ cartridges.
- Running the oil cartridge through the launcher during maintenance sessions.
- Following manufacturer maintenance recommendations.
This simple step can help keep seals lubricated and functioning properly.
Best Practice for Home Defense Readiness
For users keeping a Byrna launcher for home defense or personal protection:
Recommended Setup
✅ Keep a fresh CO₂ cartridge installed.
✅ Keep your preferred projectiles loaded according to local laws and personal preferences.
✅ Store the launcher in a secure location.
✅ Train regularly.
✅ Replace punctured cartridges after use.
Because Byrna's Pull-Pierce system does not puncture the cartridge until the first trigger pull, you can maintain readiness without continuously pressurizing the launcher.
Watch: CO₂ Storage and Maintenance Tips
For a visual explanation of proper CO₂ storage, launcher maintenance, and best practices, watch the video below:
Why Trust Nakestores?
Nakestores is a Byrna Premier Dealer and a two-time Byrna Dealer of the Year. We provide:
- Byrna launchers and accessories
- Hands-on product demonstrations
- Certified training classes
- Technical support
- Warranty assistance
- Professional guidance for Byrna owners
Whether you're new to Byrna or a long-time owner, we're here to help you get the most from your less-lethal self-defense equipment.
