For 1:
I: have a weapon on back and weapon in hands
II: disconnect
III: reconnect back, you will have both your guns, plus a new one on the floor, with all attachments/ammo
For 2:
I: quickly drop items on the floor (example: backpack, jacket...)
II: disconnect within 10 seconds of doing that
III: reconnect back, you will have the gear on you, and exact duplicates on the floor.