GSI Cuboid Compensator for NTB Non-Tilting Barrel
Designed specifically for the GSI NTB™ Non-Tilting Barrel system, the GSI Cuboid Compensator adds a distinctive squared profile while providing additional internal space for extended inner barrel configurations.
The front of the compensator features an integrated 11mm CCW internal thread, allowing compatible Airsoft muzzle accessories to be added with the separately available GSI 11mm-to-14mm CCW Conversion Adapter.
For Airsoft Use Only.
DESIGNED FOR THE GSI NTB™ SYSTEM
The Cuboid Compensator was developed specifically for use with compatible GSI NTB™ Non-Tilting Barrels.
Its simple cuboid profile provides a distinctive appearance while extending the front of the barrel system.
EXTENDED INNER BARREL CAPABILITY
One of the key advantages of pairing the Cuboid Compensator with a GSI NTB™ is the additional internal space available in front of the outer barrel.
A compatible extended inner barrel can extend into the compensator, allowing users to configure a longer inner barrel while maintaining the external compensator profile.
The NTB™ provides a stable non-tilting barrel platform for this type of extended inner barrel configuration.
Actual muzzle energy and shot performance depend on the complete Airsoft GBB setup, including inner barrel specifications, gas system, hop-up configuration, BB weight, and other variables.
11MM CCW ACCESSORY INTERFACE
The front of the Cuboid Compensator features an integrated 11mm CCW internal thread.
With the separately available GSI 11mm-to-14mm CCW Conversion Adapter, the compensator can provide a 14mm CCW mounting interface for compatible Airsoft muzzle accessories, including:
• Tracer units • Suppressors • Other compatible 14mm CCW Airsoft muzzle accessories
SIMPLE. FUNCTIONAL. NTB™ READY.
The GSI Cuboid Compensator combines its distinctive squared appearance with two practical functions:
Extended Inner Barrel Capability → Muzzle Accessory Mounting
A simple companion accessory designed specifically around the GSI NTB™ system.

