D01 Dottac Magazine Base is made of top quality aluminium, precision-machined to-the tightest tolerances and hard anodized for extra strength and striking good looks. It fit snugly onto Tokyo Marui Hi-Capa Magazine. Shifting Pin holding system designs to lock the base to-the magazine, its one piece design which no extra parts or tools needed to attach the base to your magazine. It is super easy to attach and detach from the magazine. Moreover, its innovative dottac design provides sufficient space for users to easily customise their kit based on their specific and unique needs. Highlighted features Aluminum material with CNC machined Shifting pin holding system can latch the magazine tightly Provide 10 X 14 dots for labelling Use ink or paint pen to customize Available in Black, Silver, Red and Gold *PS: Please note: installing parts / assemble /fitting airsoft gun will need intermediate knowledge; for expert or airsoft gunsmith. 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. We had a high standard of quality control on Shifting Pin Holding System. Each of it was pre-set the proper tightness and we do not recommend user to loosen the screw because it may influence the overall performance. Please refer to your airsoft gunsmith for proper installation/fitting.