Okay guys today I'll explain the how to crash a server and dupe. This doesn't include the old unstable .61 method, so please don't click off.
What you Need.
2. Knife (Stone Knife Works)
4. Persistence server
Step 1. Get the gear you want to dupe and get the server to save your gear.
Step 2. When you are ready drop the gear that you want to dupe on the ground and wait 10 seconds.
Step 3. Put rags in your hand
Step 4. Hit "f" to use rags
Step 5. Hit f3
Step 6. Hit "f" to cancel bandage
Step 7. Hit "h"
Step 8. Drag Raincoat to hands
Step 9. Cut the Raincoat into armbands
Now the server will crash and your items will be in your inventory and on the ground. If it doesn't work try it again. It is kind of random if the items dupe or not, but I've duped 4 m4's and 4 B95's using this method. Thanks for viewing this <3.