For the record, I have compared the meshes between Helgard's APC and Pulse Rifle and the ones on sale at PP. While I'm not about to make comments about comparisons between the two for quality - I can say that the meshes are completely different.

Also, there is enough of a difference in the ones in the store and the ones from the movies (I've done some research to source some clear images of the models) for them to fall under the "inspired by" category. They are not direct copies. There is enough of a change in the basic design, I feel, for them to be sold.

Helgard if you want to dispute this then please take this up over at PP (since this is where they are sold) where I would be happy to discuss this further. I only became aware of this post when it was pointed out to me.