pneumatic bb gun

its main part for pneumatic airsoft gun. you will need iron pipe with outer diameter 8.1mm and inner as unexpected 6mm, then spring (any that can pe putted on the pipe) my is 12,80mm diameter and when compressed 8,20 the air conections are made for 6mm smc hoses. with questions contact me down bellow. its work in progres so youll prebably need to sand down few things ill make mag conversion kit for it it will be glued to the top part. sorry for gramatic