AA CNC Aluminum Cylinder for AEG (400+ mm) – Nitroflon-Coated Purpose-built 6061 aluminum cylinder delivering superior air compression efficiency in AEG rifles configured with 400–550 mm inner barrels. Advanced CNC machining produces a frictionless internal bore, complemented by precision-cut external grooves that optimize thermal management during extended engagements. The nitroflon internal coating significantly reduces wear and friction, translating to improved shot consistency and longevity. Action Army's barrel-length-specific engineering ensures accurate volume ratios when factoring in your BB mass and piston configuration, effectively eliminating joule creep. Validated through rigorous testing in demanding scenarios, this cylinder excels in high-performance builds. Pair with complementary Action Army components for maximum synergy and reliability.