Byrna CO₂ Troubleshooting Guide

Summary

The most common cause of CO₂-related issues in Byrna launchers is an empty or depleted cylinder . Because the CO₂ system only activates after the trigger is pulled, users may not realize when their cylinder has been punctured or slowly leaked over time.

Key Takeaways

• Most CO₂ issues are caused by an empty cylinder
• CO₂ is only punctured after pulling the trigger, not during installation
• Once punctured, CO₂ can slowly leak over 24–48 hours
• A launcher that won’t fire typically has no usable CO₂
• Replace the cylinder if performance becomes weak or inconsistent

Overview

CO₂ serves as the power source for Byrna launchers. Installing a cylinder alone does not activate it. The seal is punctured only when the trigger is pulled for the first time, pressurizing the system.

After puncture, CO₂ begins to gradually dissipate, even if the launcher is not used. Over a period of 24–48 hours, the cylinder may lose enough pressure to impact performance or stop functioning entirely.

How the CO₂ System Works

1. Insert the CO₂ cylinder into the launcher
2. Pull the trigger to puncture the cylinder seal
3. The launcher becomes pressurized
4. CO₂ is used to power each shot

Once punctured, pressure will decrease over time whether or not the launcher is in use.

Common Symptoms

If your launcher is experiencing CO₂ issues, you may notice:

• Launcher not firing at all
• Weak or low-power shots
• Inconsistent shot performance
• No audible pressure or gas release

Troubleshooting Steps

Step 1: Confirm CO₂ Activation

Ensure the trigger has been pulled at least once after installing the cylinder to puncture the seal.

Step 2: Replace the CO₂ Cylinder

If the launcher is not firing or performance is reduced, install a new CO₂ cylinders  .

Step 3: Test Fire

After replacing the cylinder, test fire the launcher to confirm proper operation.

Best Practices

• Install CO₂ only when you plan to use the launcher
• Avoid storing the launcher with a punctured cylinder
• Replace cylinders when power begins to drop
• Carry spare CO₂ cylinders for reliability

Important Considerations

• CO₂ is not active until the trigger is pulled
• Punctured cylinders may leak over time
• The majority of issues are caused by empty CO₂
• Proper storage helps maintain system reliability

Frequently Asked Questions

Why is my Byrna not firing?
The CO₂ cylinder is most likely empty or depleted.

Does installing the CO₂ cylinder activate it?
No, activation only occurs when the trigger is pulled.

How long does a CO₂ cylinder last after puncture?
Typically 24–48 hours, depending on conditions.

Can CO₂ leak without firing?
Yes, once punctured, slow leakage can occur even without use.