Product Overview Product Name : ZZRR-3.5 (Zig Zag Revolver Ring Caliber 3.5 mm) (3D Print Kit Gun) Manufacturer : Imura Industries (Japan) Designer : Yoshitomo Imura Designed : 2021 Material : Carbon Steel or Stainless Steel Caliber : 3.5 mm Shoot : 6 Barrel Type : Taper Bore Barrel Barrel Length : 15 mm Spring (Purchase) Spring 4 (Inner3.5) ~20 Spring 3 (Inner2.5) ~5 Spring 2 (Inner1.5) ~10