This trick have been done by 5 different players and have worked for each. This is a trick for weapon renewal kits.
1) Have to be Silver Grade or higher
2) Buy a 1 day nx gun.
3) Buy 5<<<< renewals kits.
4) open 3 if my the third one it doesnt work then yu out of luck but it has 5 str8 times sooo yea.
Proof> https://www.xfire.com/video/449312/
Thanks and Rep!