A modified JG-840 with space for two extra magazines and a faster reload. The JG-842 "The Billy" is a preset variant of the JG-840 fitted with a Bandolier 2, and Quick Fingers 1. The slotted upgrades cannot be changed. The JG-842 "The Billy" is exactly the same as the JG-840 but has two pre-defined upgrade slots, so for specifics on the use / stats of this gun you can check the JG-840 page.
Unlocking the JG-842 "The Billy"
Criminals - Level 6 with Harmon Benjamin
Enforcers - Level 6 with Miguel Estebano