This barrel extension is in good condition. Features Include: Instant FPS / Range / Accuracy boost without internal work. Increases FPS by 60~70 FPS. (Measured with 0.20g Angel Custom bb) 12mm+ MP7 Steel Flashhider included. Construction out of aircraft grade T6 Aluminum. Includes Angel Custom Stainless Steel 6.01mm Tightbore Barrel Integrated Barrel Bushings Easy Quick Detach / Attach Function Attaches directly to KWA KSC VFC MP7 GBB Professional grade anti-rust matte black oxide finish. I will combine shipping on multiple purchases and I will accept reasonable offers.