Byrna EP Troubleshooting Guide

Summary

This guide helps identify and resolve the most common issues with the Byrna EP launcher so you can quickly restore proper function and performance.

Overview

The Byrna EP is designed for consistent and reliable performance. Most issues are caused by setup errors, incorrect components, or improper use rather than defects. Common problems include failure to fire, CO2 issues, reduced power, and jamming.

Following the steps below will resolve the majority of these issues.

Troubleshooting by Issue

Not Firing

If your Byrna EP is not firing:

Check Trigger Operation

• Ensure the trigger is pulled all the way back
• A partial trigger pull will prevent the launcher from firing

Check CO2 Cylinder

• Confirm the CO2 cylinder is new and not empty
• An empty cylinder will not provide pressure for firing

CO2 Not Puncturing

If the CO2 cylinder is not puncturing:

Improper Installation

• Push the CO2 cylinder in firmly before installing the cap
• Tighten the cap until snug
• Do not overtighten, as this may affect trigger function

Trigger Use

• The trigger must be fully depressed
• This action punctures the cylinder and pressurizes the launcher

CO2 Brand Issues

• Some brands may not puncture reliably
• Byrna does not recommend Crosman CO2 cylinders due to inconsistent performance

Low Power

If the launcher is firing with reduced power:

• The CO2 cylinder is likely nearly empty
• Replace it with a fresh cylinder

Low pressure reduces velocity and overall performance.

Jamming

If the launcher is jamming:

Overloading the Magazine

• Avoid 5+1 loading
• Overloading prevents proper projectile movement

Aftermarket Projectiles

• Non-Byrna projectiles may be out of round or incorrectly sized
• This can cause them to become stuck in the barrel

Only use Byrna-approved projectiles to minimize jamming issues.

FAQs

Why is my Byrna EP not firing?
Most commonly caused by not fully pulling the trigger or using an empty CO2 cylinder.

Why won’t my CO2 cylinder puncture?
Likely due to improper installation, incomplete trigger pull, or inconsistent CO2 brand performance.

Why is my launcher losing power?
The CO2 cylinder is running low and needs to be replaced.

Why is my launcher jamming?
Typically caused by overloading the magazine or using non-approved projectiles.

Can I use any CO2 brand?
Byrna recommends using approved cylinders. Some brands, such as Crosman, may produce inconsistent results.