Currently the Vickers MK1 no.2 is a gimmick. It can only be used when crouched or prone and isn’t that effective out of spitting distance.
For example here is a video of me firing around 100 round from a stinger and the Vickers. Keep in mind the stinger has a higher rate of fire:
If you think I’ve faked this I encourage you to try it yourself.
I understand the stinger weighs more and therefore that reduces recoil but both have their magazine in approximately the middle so this shouldn’t reduce recoil by that much.