How to make weapons on the ground can be picked up infinity times

Game Mods
1

I noticed the weapons in the “GUN RANGER” Mod can be picked up infinity times.
But i can’t find any property about the “pick up times”.
How can i do it?

2

It’s not infinite, the creator just placed hundreds of them in the same spot

3

really? But i open the mod by mission editor and select a gun on the ground. The mission editor tell me it’s only one item.

4

If I want to place a large number of items in the same spot, how do I make their models overlap look like as only one item?

5

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In this case there are 8 weapons here.
You do this by literally clicking RMB.

6

Oh, think you very much. It look like just one.