GBB parts
GBB Parts – Everything you need to get maximum performance from your gas replica
Gas Blow Back pistols and rifles are popular because of their realistic operation and sharp recoil, but to really get the most out of your replica, customisation is required. At Airsoft Legends, you will find an extensive selection of GBB parts from top brands such as CowCow Technology, Maple Leaf, KJ Works, WE Airsoft, TTi Airsoft, LayLax and Ra-Tech. Whether you want an improved air seal, more accurate shot pattern or more responsive cycle – you will find the right parts here.
Why choose GBB upgrades?
A good set of GBB parts will take your replica to a higher level of performance. Think of accurate inner barrels, stable hop-up chambers, durable nozzles and tunable NPAS systems. Ideal for players who want to fine-tune their sidearm or convert an existing GBB into a high-performance backup.
What can you find in this category?
- Inner barrels in various diameters for better precision
- Hop-up chambers and buckings for more stable BB flight
- Nozzles and valves (inlet/exhaust) for optimal gas flow
- Mag lips and pistons for reliability during intensive use
- Tuning parts such as NPAS systems and piston heads
- Cosmetic upgrades such as precision outer barrels and pistol slides
- Suitable for brands such as Tokyo Marui, WE, KJ Works, GHK and more
Who is it suitable for?
- Avid airsofters who want to fine-tune their GBB sidearm
- Tech-savvy players who demand performance and reliability
- Airsoft engineers who want to create custom builds
- Players who like to experiment with NPAS tuning and gas management
Frequently asked questions about GBB parts
Are GBB parts universally compatible?
Not always. Many parts are brand or platform specific. Therefore, always check whether a part is suitable for your type of GBB, such as a Marui-compatible system or WE platform.
What exactly does an NPAS system do?
An NPAS (Negative Pressure Adjustable System) allows you to regulate the gas flow and thus the FPS of your replica. This is especially useful for fields with strict joule limits or changing weather conditions.
Do I need to replace my nozzles and valves regularly?
Yes, especially with intensive use. Wear and tear on nozzles or mag valves can lead to gas leaks or inconsistency. Replacing them in good time prevents loss of performance.
Are cosmetic upgrades purely for appearance or are they also functional?
Although many cosmetic upgrades are mainly visual (e.g. precision slides), some models can offer extra stability or an improved fit.
Combine your GBB parts with our Airsoft GBB Magazines for a complete loadout or check out the Gas & CO2 Bottles and Capsules to ensure a stable gas flow at all times. For even more precision in your setup, the Hop-up Buckings are also valuable additions.
Take your GBB to the highest level – with parts that make the difference.















