yes the magazines are compatible with warsensor, but I'm not sure about Ariakon.
As for the story, I can only give my opinion(and I say opinion, because other people have other versions and I don't care to argue about it
).
There was a factory overseas and the US distributor was Armotech US. In a dispute of some kind Armo quit importing the zeus and began making them in house as the warsensor Zeus G+s. Warsensor apparently didn't have rights to or didn't feel like producing the Armotech Long guns so they dropped them and went to work on the WG-47. Later a company formed to import the long guns that was named Miltec. After a while again the Miltec brand began importing the original pistol(without the Zeus name which Warsensor kept) as the G1 and G2. The threading on the Warsensor model is a monument to exclusivity.
The G1's threads and stats are the same as the G2, you just don't have the crazy little barrels and the barrel porting is slightly different, other than that they are identical.
Rob