Originally Posted by crashonskis
alright thanks, but I meant that they disassembled it at the border
Simply put, it is illegal to bring or ship an airsoft gun across the border (edit: without the proper licensing that retailers have), customs will not intentionally allow it passed, and will confiscate it, and you may face criminal charges for attempting to "smuggle" it in.
As has been said many times, do not try it, it is stupid.
Some parts can be imported, the thread that has been linked about 4 times now explains this.
However these parts will only make it across if they are not shipped with restricted items (like a gun or receiver for a gun), and if customs doesn't take it for the hell of it.