GBB inner Barrels

GBB Inner Barrels for airsoft - for maximum precision and improved range

GBB Inner Barrels are among the most impactful upgrades for your gas platform. A high-quality inner barrel ensures a tighter BB trajectory, less friction, more consistent air discharge and more accurate shot projection. Whether you use a sidearm for CQB or fine-tune a rifle for outdoor precision, a premium inner barrel will immediately improve your grouping, stability and effective range.

Why choose a GBB inner barrel upgrade?

Standard barrels function well but do not utilise the full potential of your GBB. A precision barrel with tight tolerances and high-quality finish reduces air loss and friction, resulting in a smoother BB trajectory. Combined with a suitable bucking and hop-up unit, this delivers noticeably more accurate results at any distance.

What can you find in this category?

• Inner barrels in various precision-grade diameters such as 6.01 to 6.04 millimetres
• CNC-milled precision barrels with minimal tolerances
• Stainless steel and brass variants with optimal internal finish
• Compatible models for GBB pistols and rifles
• Suitable for upgrades in combination with buckings, NPAS and hop-up tuning

Who are they suitable for?

These parts are ideal for airsofters who want to achieve maximum precision, players looking for tighter grouping in CQB environments, technical builders who tune their GBB to BB weight and pressure, and anyone who wants to replace a standard barrel for increased performance.

Frequently asked questions

What is the difference between a standard and a precision inner barrel?

A precision barrel has a narrower diameter and better finish, which ensures a tighter BB trajectory and more stable shots.

What length inner barrel do I need?

Choose the length based on your replica. Pistols usually use 90 to 120 millimetre barrels, rifles vary from about 250 to 400 millimetres.

Is stainless steel better than brass?

Both are suitable. Stainless steel is more durable and wear-resistant, while brass is more susceptible to internal damage such as scratches. The choice depends on your preference and desired finish.

Do I also need to replace my bucking when upgrading my barrel?

Yes, for optimal results, a new barrel is often combined with a matching bucking and a well-adjusted hop-up unit.

Buying guide

• Choose a diameter that suits your desired level of precision
• Select the right length for your pistol, carbine or rifle
• Consider your material preference, such as stainless steel or brass
• Combine with a new bucking for maximum accuracy
• Check compatibility with your GBB platform and hop-up unit

Top tip: Combine an inner barrel with a high-quality hop-up bucking so that spin, stability and shot consistency are perfectly matched.

For a complete GBB upgrade, GBB Hopup Chambers & Buckings, Nozzles, Valves, NPAS parts, GBB Magazines and Gas and CO2 Bottles are the perfect match. By refining these parts together, you create an accurate, efficient and stable gas system that remains reliable under any playing style.

With GBB Inner Barrels, you are choosing precision, stability and an upgrade that noticeably refines every shot cycle.