OKay so this is what u do.
1. Buy your crates, doesnt matter what ones or how many.
2. Make a room or join a game that hasnt started.
3. Make sure that the game has all 16 players in it.
4. Your team must win!
5. Open your crates.
If the game ends with 15 players or you didnt play a full game cuz u dc'd or got kicked u need to open your crates and buy them again. This glitch is supposed to give u 80% higher chance to win the perma gun. hope this helps. THIS HASNT BEEN CONFIRMED BY ME. i will be testing it soon.