We have ready builds for the RK-9: close range, long range. Pick a style and your weapon level in the lab above and we equip the right parts for that level, with stand-ins until the parts unlock.
What is the RK-9 max level?
The RK-9 maxes out at weapon level 42. After that you can enter weapon prestige and unlock its prestige attachment.
How many attachments does the RK-9 have?
We list 46 compatible attachments for the RK-9 across 9 slots, each with its unlock level and what it does.
What is the RK-9 prestige attachment?
The prestige attachment is the MFS Ironlung Handstop. It unlocks after you reach max level and enter weapon prestige.
What are the alternatives to the RK-9?
In the same class: CARBON 57, CBRS-3, DRAVEC 45. Each has its own page with level-by-level builds.