da Vinci GUREN 1 6.03mm Carbon Steel Inner Barrel for Marui Model M&P9 / PX4 (90mm) Power-(fps)_295 although not necessary for adjustment

although not necessary for adjustment

Design For Upgrade your Hop Up Base More Durable

That provides ergonomically optimized to reduce muscle fatigue

Engraved "Avalon" logo on Receiver

da Vinci GUREN 1 6.03mm Carbon Steel Inner Barrel for Marui Model M&P9 / PX4 (90mm) Power-(fps)_295 although not necessary for adjustmentGuren is made of precise carbon steel & process the HV500 Coat for the surface. This plating reinforced a hardness of the surface so achieve around HV500. Its better than stainless steel (from HV200 to 400) Itll be kept clean & beauty surface for long time. Of course, its good for anti rust. Guren 1 is simple design. The muzzle end has crown cut. Low cost barrel series but its potential is enough for upgrading. da Vinci GUREN 1 6. 03mm Carbon Steel