How do you root lg g3 (T-Mobile )

Hi xda, I just bought a new lg g3 from T-Mobile running android version 5.0.1. I need help rooting this phone without bricking my device, I am afraid to do it own my own because my last became hard-bricked. (P.s. If this is any help I will leave more phone information below)
Build Number: LRX21Y
Kernel Version: 3.4.0
Software Version: D85120e
Model Number: LG-D851
Carrier: T-Mobile
Android Version: 5.0.1