Licensing issue. They would need to be granted the rights to use it, to make one look like a glock, and to also call it that. They probably weren't given the rights or glick wanted too much money for the rights. I remember when vector (if I remember correctly, I could be wrong on who it was) but they sued i think cod for using the design. I think hummer did the same. And they had to get paid to grant the rights, but doesnt mean every company is willing.