Board Thread:Bug Reports/@comment-35052096-20180826010723/@comment-34424711-20180826224910

Robustloris wrote: This isn't a bug. It's like you equipped a Python in the primary slot for your loadout. then you equipped a vest which extends clips like Faraday/Tactical, etc.

You equipped RPG as a primary weapon, so these extra rockets were supposed to be added. If it was equipped as a secondary then it wouldn't be extended. Rpg is a power weapon.