Front & Rear sightAluminum Construction (CNC Machined) Suitable for Tokyo Marui Hi Capa 4. 3 Series Airsoft Gas Blow Black GBB Pistol Come With Two Fiber Optic (Red and Yellow), Ideal aid to help you aim your target in low light condition As always, upgrading GBB require necessary skill & technique, consult expertise if needed Major Color : BlackBuilt Material : Aluminum *PS: Please note: installing parts assemble fitting airsoft gun will need intermediate knowledge;