Prometheus EG Barrel

The widened hop-up window is specifically designed to accommodate advanced modifications like R-HOP patches. It provides more surface area for the hop-up bucking to engage with the BB, allowing for more consistent backspin and greater effective range.

This barrel is compatible with most standard Tokyo Marui-spec AEGs. Because it is 363mm long, you should verify that your current outer barrel can accommodate this length to ensure the inner barrel does not protrude or sit too far back.

A 6.03mm bore is considered a 'tightbore' specification. It reduces the amount of air that escapes around the BB as it travels down the barrel, which typically increases muzzle velocity and improves shot-to-shot consistency compared to standard stock barrels.

Stainless steel is highly durable and resistant to corrosion, so it does not require special coatings. You should still clean the bore periodically with a lint-free cloth and a small amount of silicone oil to remove debris and maintain accuracy.

Yes, while the window is designed for advanced tuning, it is fully compatible with standard AEG hop-up buckings. You do not need to perform an R-HOP modification to use this barrel effectively.