AIP Stainless Steel Threaded Outer Barrel-TM Hi-capa 5.1

- Stainless Steel 304 Construction (CNC Machined) and marking .40 ACP- From 11mm Clockwise to 14mm Anti-Clockwise- The Silencer Attachment is Aluminum Construction- Suitable for Tokyo Marui Hi-Capa 5.1 Series Airsoft Gas Blow Black GBB Pistol- As always, upgrading GBB require necessary skill & technique, consult expertise if needed