Resin products, exterior parts only, Does not include metal, does not affect initial velocity, Not related to firing function, no lethality. Material: Resin For Tokyo Marui Gas Gun Hi-Capa 4.3 Super PLA high strength, high toughness resin Gun-style custom slide 14mm reverse screw and front sight, rear sight ※Outer barrel is not required. Blowback is extremely smooth. ※Tested, spring plug part sanded. In the unlikely event of lot differences, you may need to adjust it yourself. ※Does not include the main body, slide internals, barrel, or related metal parts. The photo is an example of assembly. ※Assembly experience and problem-solving skills are required. Please use at your own risk. *Lubricating oil is recommended during assembly ※No need to bend when assembling the breech. Screws are required. Be careful not to deform by overtightening screws. This is a laminated print, not a photolithography. There are layer patterns, defects, sanding marks, etc., unique to laminated printed products. Applying strong impact before assembly may cause damage. Recommended for those who want to customize it themselves, Fixed price, no negotiation. If sold on another channel, this listing will be removed. Please understand. Tokyo Marui GBB Gas Blowback Hi-Capa as base Fixed price, no individual price reductions, silent transactions are also welcome This is not for enhancing power. It cannot be used for modifications that deviate from Marui's design. Since the slide always suppresses the recoil spring, a strong spring is not recommended. Hard buffers are harmful to operation. Information is for reference only and should not be interpreted broadly. It is not guaranteed. Since we cannot confirm the customer's actual unit, it is 3N after assembly.