Paintball O-Rings & Seal Kits

Paintball O-Rings & Seal Kits

O-rings and seals are essential components in paintball guns that ensure proper function and prevent air leaks at crucial joints and connecting sites. They play a special role in maintaining the airtight seal needed for efficient operation and consistent shooting performance. These seals in paintball guns are often located between various moving parts, such as the bolt, valve, and air source and maintain pressure within the marker. This pressure is necessary for firing paintballs accurately and consistently. O-rings and seals for paintball guns are typically made from high-quality rubber materials like Nitrile (Buna-N), Polyurethane (PU), or Ethylene Propylene Diene Monomer (EPDM). The choice of material depends on the specific application and compatibility with the type of gas or air used in the marker.

Types of O-Rings & Seal Kits

Tank O-rings

These o-rings are located on the tank's regulator and provide an airtight seal between the tank and the regulator or ASA.

Bolt O-rings

These o-rings are found on the marker's bolt assembly, creating a seal between the bolt and the breech. They direct the air in a forward direction to properly propel the paintball out of the barrel.

Valve O-rings

These are situated in the marker's valve, ensuring that it opens and closes correctly to control the air or CO2 flow.

Detents and other Seals

Paintball markers may also have other seals in various locations to prevent air leaks and ensure smooth operation.

Maintaining Paintball O-Rings

Proper maintenance of O-rings and seals is crucial to the longevity and performance of a paintball marker. Players should regularly inspect these components for wear, damage, or deterioration. When they show signs of wear or damage, they should be replaced promptly. Lubricating O-rings with paintball-specific marker oil or grease is also recommended to reduce friction and prevent drying or cracking.

When replacing O-rings and seals, you must use compatible replacements designed for your specific paintball marker model; unfortunately they are not universal. Many paintball markers come with a set of replacement O-rings and seals, and you can also find aftermarket kits with a variety of O-ring sizes to suit different parts of your marker.


If you experience air or gas leaks in your paintball marker, they are often traced back to worn or damaged O-rings or seals. Identifying and replacing the faulty component(s) is essential to resolve the issue and maintain your marker's performance. If you need to find replacement o-rings, planet eclipse recently came out with an application that helps you find the right size o-rings for your marker. To see how this application works, take a look at our helpful YouTube video below: 

Official Planet Eclipse O-Ring Finder App