Gunsmith Bros production, design for Marui Hi-CAPA series. Material : Aluminum Grip and Magwell / Steel Magazine Release Catch Item Code : GB-G-02-var Note: Due to different batch production, the individual accessories might contain slightly variance from the product photo (for example: trigger guard, magwell, magazine release catch, etc) Base pad for Tokyo Marui 5.1 magazine needed to change to Airsoft Masterpiece base pad for this type of aluminum grip. *PS: Please note: installing parts / assemble /fitting airsoft gun will need intermediate knowledge; for expert or airsoft gunsmith. Please refer to your airsoft gunsmith for proper installation / fitting. Fitting may be needed as the condition of each airsoft gun might be different. Regular maintenance is needed for all airsoft guns in order to keep it in good working condition and reduce wear out issue on parts.