The Heretic Labs Carbon Fiber Outer Barrel – 5.5″ is a lightweight outer barrel for players building a compact MTW-spec setup without adding unnecessary front-end weight. Made from CNC aluminium with genuine carbon fibre, it gives your rifle a clean, modern look while keeping the front of the gun feeling fast and easy to control.
At just 95 grams, this 5.5 inch version suits shorter builds where quick handling matters. In practical use, that means smoother target transitions, less fatigue through longer skirmish days, and a setup that feels more responsive when moving through tight spaces.
It is designed to fit MTW-spec platforms including the MTW and Article Series, with stated compatibility covering MTW M4, MTW-9, MTW-308 and MTW Shotgun models. It also accepts airsoft-spec flash hiders and tracers, making it easy to finish your build with the right muzzle device, and the included CNC barrel stabiliser helps keep everything properly supported.
For a compact MTW build with low weight and a premium finish, this barrel is an easy addition to get right.










