Laylax Prometheus Stainless Steel Inner Barrel for M4A1 MWS AEG (6.03mm - 250mm)

Take your gas blowback performance to the next level with precision Japanese engineering in the Laylax Prometheus Stainless Steel Inner Barrel for M4A1 MWS (6.03mm - 250mm)! Designed specifically for the Tokyo Marui M4A1 MWS Gas Machine Gun series and compatible TM GBBR platforms, this precision tightbore barrel is an essential upgrade for operators looking to squeeze every bit of range, velocity, and grouping consistency out of their rifle.

6.03mm Tightbore Precision & High-Tolerance Craftsmanship

Factory inner barrels often feature wider bores (typically around 6.08mm) that allow expanding propellant gas to escape around the BB. The Laylax Prometheus barrel narrows this internal channel to a tight 6.03mm diameter while maintaining an incredible manufacturing tolerance of $\pm 0.01\text{ mm}$. By creating a tighter seal around 6mm airsoft BBs, it harnesses gas pressure far more effectively, yielding an immediate boost in overall muzzle velocity (FPS) and shot consistency without requiring heavier gas pressures. The mirror-polished interior surface minimizes internal friction, delivering a smoother, flatter flight path downrange.

High-Grade SUS Stainless Steel Construction

Unlike traditional brass inner barrels that are prone to scratching, bending, or tarnishing over time, this Prometheus barrel is CNC-machined from high-grade SUS stainless steel. Stainless steel offers exceptional structural rigidity, eliminating micro-vibrations caused by gas discharge during fast semi-automatic follow-up shots or rapid full-auto fire. The surface requires no special anti-corrosion coatings, ensuring long-term durability and consistent performance across varying field environments.

Tailored Fitment for Tokyo Marui MWS GBBR Systems

At 250mm in length, this barrel is sized specifically to drop seamlessly into the Tokyo Marui M4A1 MWS receiver assembly. The hop-up window cutouts and alignment notches are precision-machined to integrate perfectly with the TM MWS chamber unit and stock or aftermarket GBB hop-up buckings, eliminating air leaks and ensuring proper seating.

Whether you are fine-tuning a CQB build or building an elite long-range MWS carbine, the Laylax Prometheus Stainless Steel Inner Barrel (6.03mm - 250mm) provides the high-level Japanese craftsmanship needed to out-shoot the competition on the skirmish field.