GBB inner Barrels

Greater precision and range – Inner Barrels for GBB replicas

Want to transform your GBB pistol or gas rifle into a precision weapon? Then high-quality inner barrels are one of the most effective upgrades. Not only do they run tighter and smoother than stock barrels, but they also reduce friction and ensure a more consistent BB trajectory. Perfect for those who take their airsoft replica seriously – whether it's CQB or outdoor.

Why choose a GBB inner barrel upgrade?

Standard barrels in GBB replicas are often good, but not optimised. By switching to a precision inner barrel with a narrower diameter and better finish, you can take your performance to the next level. In combination with a good bucking, you will immediately notice a difference in accuracy, group size and effective range.

What can you find in this category?

• Inner barrels in diameters from 6.01 to 6.04 mm
• CNC-milled precision barrels for minimal tolerances
• Stainless steel and brass versions with polished interior
• Compatible with GBB pistols and rifles from Tokyo Marui, WE, KJW, GHK and others
• Available in different lengths for sidearms, carbines and SMGs
• Suitable for upgrades in combination with buckings, NPAS and hop-up units

Who is it suitable for?

• Airsofters who want to get maximum precision from their GBB
• Speedsofters who rely on tight grouping in CQB
• Tech-savvy players who want to match their barrel to BB weight and pressure
• Anyone who wants to replace their standard barrel for better performance

Frequently asked questions about GBB inner barrels

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

A precision barrel has a narrower diameter (6.01–6.04 mm) and a better finish, which ensures tighter grouping and better stability than stock barrels.

What length inner barrel do I need?

This depends on your replica. Pistols often have 90–120 mm barrels, while carbines and rifles tend to have 250–400 mm barrels. Always choose a length that suits your model.

Is stainless steel better than brass?

Stainless steel barrels are more wear-resistant and durable, while brass barrels often have a slightly smoother surface. Both are suitable, depending on your preference and budget.

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

Yes, a new barrel often only delivers optimal results in combination with a good bucking and hop-up unit.

Combine your inner barrel upgrade with GBB Hopup Chambers & Buckings for the best spin and stability, or opt for a GBB Nozzle to improve your air seal. Those looking for maximum performance can also consider an NPAS upgrade for complete control over gas consumption and FPS.

Precision starts at the core – choose an inner barrel upgrade for your GBB.