Heretic Labs Airsoft Airline for Tank Grip – 6.5″ – MTW M4 / MTW-9 / Article Series
The Heretic Labs Airsoft Airline for Tank Grip in 6.5″ length is a short HPA airline designed for tank grip setups on MTW M4, MTW-9, and Article Series platforms. A tank grip integrates the HPA tank directly into the pistol grip of the rifle rather than running a line from a separate body-mounted tank — the airline connects the tank grip to the engine and must be short enough to route within the grip and lower receiver without excess line. At 6.5″, this airline is the correct length for the internal routing between the tank grip and the Wolverine engine in MTW M4, MTW-9, and Article Series builds.
Heretic Labs is a specialist airsoft technical products brand. For operators building an integrated tank grip setup on the MTW M4, MTW-9, or Article Series, this 6.5″ airline is the correct length for the internal routing in these platforms.
- Heretic Labs Airsoft Airline for Tank Grip — 6.5″
- Compatible with MTW M4, MTW-9, and Article Series platforms
- Short 6.5″ length for tank grip internal routing
- Made by Heretic Labs — airsoft technical specialist





