Laylax Prometheus EG Barrel for M4 PMC (6.03mm - 185mm)

Compact M4 PMC rifles and stubby CQB builds often struggle to maintain tight shot groupings at extended distances. The Laylax Prometheus EG Barrel for M4 PMC (185mm) solves this performance bottleneck by bringing legendary Japanese SUS304 stainless steel tightbore technology to short-barrel Airsoft Electric Rifles (AEGs). Designed as an essential drop-in upgrade, this barrel bridges the gap between ultra-compact maneuverability and full-length rifle accuracy.

Cold-Forged SUS304 Stainless Steel Rigidity

While standard factory brass or aluminum inner barrels are prone to flexing, warping, and internal surface degradation over time, the Prometheus EG series is CNC-machined from cold-forged SUS304 stainless steel. This heavy-duty construction eliminates internal vibrations during high-rate-of-fire gearbox cycles. The precision-ground 6.03mm internal bore forms an optimal pneumatic seal around standard 5.95mm BBs, harnessing expanding cylinder air to boost muzzle velocity (FPS) without requiring a heavier gearbox main spring.

Lapped Interior Bore & Precision Target Crown

The internal surface of the barrel undergoes a meticulous polishing and lapping process to achieve a mirror-like finish. This dramatically reduces friction as BBs travel down the 185mm length, preserving backspin energy imparted by your hop-up bucking. At the muzzle tip, a precision-cut crowning stabilizes the escaping air cushion, ensuring a smooth transition into free flight without air turbulence disrupting trajectory. The hop-up window is cut to precise Tokyo Marui specifications, ensuring seamless compatibility with aftermarket hop-up chambers and buckings.

Key Features & Technical Benefits:

• Cold-Forged SUS304 Stainless Steel: Offers extreme structural rigidity, corrosion resistance, and long-term bore integrity.

• 6.03mm Precision Tightbore Diameter: Increases air compression efficiency to boost FPS and tighten shot clusters.

• 185mm PMC Tailored Length: Ideal drop-in fitment for M4 PMC models, short-barreled CQB rifles, and custom stubby builds.

• Mirror-Polished Internal Finish: Minimizes friction to maintain consistent hop-up backspin and flight stability.

• Made in Japan Engineering: Machined to exact tolerances for reliable alignment with standard Version 2 hop-up chambers.

Installation & Field Guidance

Before installing your new Prometheus EG inner barrel, draw a clean microfiber patch lightly dampened with rubbing alcohol through the bore to remove any protective manufacturing oils. Pair this barrel with a high-performance 60° or 70° AEG bucking and a rigid hop-up nub for maximum trajectory control. To prevent jams within the precision 6.03mm bore, strictly feed high-grade, seamless 5.95mm competition BBs during skirmishes.