A modular JG-840 with attachments for up to 3 upgrades. The JG-1140 is exactly the same as the JG-840 but has slots for 3 weapon upgrades, so for specifics on the use / stats of this gun you can check the JG-840 page.
Unlocking the JG-1140
Criminals - Level 6 with All Contacts
Enforcers - Level 6 with All Contacts