has anyone used that antitank gun in a unit

that thing is huge!!!
I am going to use it on a vehicle.
The prop itself is not scaled to Poser. As it is right now, it is ready to use in most 3d Apps. 3ds, LW, C4d and Bryce. But for now, you have to scale(resize) it to use it in Poser. Or you can just wait, because I will be updating the ZIP file to include a Poser sized and rigged prop. I am just going back and forth whether it should be what is called a joint rigged prop or if I should turn it in to a character.
A joint rigged prop is where all the parts are seperate props which are loaded as a single object but are still seperate items. This can be easily smart proped to the PDM. And in some ways is easier to work with... except that you have to select which part you want to move as a seperate prop.
Or I can make it a custom Poser Character. The rigging is more complex since it is a hard surface item. And, there may be gotchas which I simply do not know about, having never made a full character before. But, to move stuff around you can just have all the dials on the centeral figure. Only items which can be detached from the body need to be saved as seperate props (such as the Clip).
For now, both the Bren LMG and the Boys AT rifle are ready to go as Joint rigged props.
For the Bren LMG this means; Left leg, right leg, bi-pod top, forward carry handle are all joint rigged. And Rear handle and Clip are detachable props. So load the Bren and see 7 props
For the Boys AT rifle, the bipod and bolt are joint rigged and the clip is a detachable prop. So load the Boys AT and see 4 props.
This seemed kinda ugly to me, so I have been working on making them characters. But boning (rigging) a complex/detailed hard surface item is a collosal pain in the rear.
I see now, why most detailed props are released as single objects with little or no movement. Originally I had the triggers animated as well, but I figured no one could see that and so welded them to the main chassis.