The default parameters are suitable for BB guns. Water gun players can reduce the number of layers and filling material appropriately. For water guns, 0.4 mm thick and three layers are enough

The Picatinny rail on the mainland of China can be installed perfectly. For models like the Xiaoyue ARP9, you need to pad the thread and lock it with a JMGO screw

The hardware parts are M5X35 JmGO screws, and the threaded ring can be optionally equipped with two M3x8 JmGO screws