Use Instruction:① Open insurance clip② Pull out the insurance pin③ Open bumper④ Unscrew the head part⑤ Remove the gasket⑥ Fill with object.
It is empty inside. It is able to filled with BB or sand to increase its weight.It is capable of storing about 620 BBs.
Adapt to Molle system. It can be removed quickly.
It is able to disassemble according to your needs.