i think con rings are like raven spiral. Raven Spiral as we know it, is NOT legit. Have you ever seen a dropped raven spiral? it sucks. no use. Constricting rings, are legit, the 'bugged' 100 mf rings are not. If you do not beleive me, do a few mf runs, find yourself a raven spiral, and you can see i am rite ... like always