If you have 1 weapon that can fit with a PU Scope 3,5 in the back and one weapon in the hand with the pu scope and want to switch the long range scope to the weapon in the hand. PU Scope switch to Weapon on the back. Long range scope disappear.
Inventory was full.
No drop: I scanned the ground within 20 meters.
After that i raged a little bit :-))).