Yeah, I think your input regarding CC weapons was drowned by a tidal wave of ranged weapons stuff.
The Vibro-Gauntlets seems to be a perfect fit for Rending judging by the fluff. Regarding the Sonic Helm however, it already has close equivalents in existence, specifically, Eldar Howling Banshees' Banshee Masks. I would suggest changing it to counting as frags and doubling Init on the charge instead, as completely shutting down a unit's attacks as long as you successfully roll to wound that unit once seems OP.
To get the ball rolling, here's 2 more CC weapons ideas:
Sonic Lance
This weapon is unique amongst Cythor sonic weapons in that it is intended to be used in close combat. It is so named because of its' resemblance to a spear. Seconds before contact the bearer primes the weapon by activating the crystal charge process. Upon completion a powerful sonic blast is channeled down a long and thin focusing chamber directly onto the enemy itself. The impact is powerful enough to blow holes large enough to put a bolter through in a Space Marine's armor.
Sonic Lances may only be used on a turn in which their bearer charges. They grant +2S, ignore armor saves, and reduce the I of any model wounded but not killed to 1. Vehicles suffer an automatic 'crew stunned' result in addition to any result rolled on any glancing or penetrating hit.
Razor Talons
A set of artificial claws mounted on a gauntlet, the razor-serration on these wicked talons make them brutally effective at tearing flesh and bone apart
Models with Razor Talons gain +1S and reroll any failed rolls to wound in close combat.
The Vibro-Gauntlets seems to be a perfect fit for Rending judging by the fluff. Regarding the Sonic Helm however, it already has close equivalents in existence, specifically, Eldar Howling Banshees' Banshee Masks. I would suggest changing it to counting as frags and doubling Init on the charge instead, as completely shutting down a unit's attacks as long as you successfully roll to wound that unit once seems OP.
To get the ball rolling, here's 2 more CC weapons ideas:
Sonic Lance
This weapon is unique amongst Cythor sonic weapons in that it is intended to be used in close combat. It is so named because of its' resemblance to a spear. Seconds before contact the bearer primes the weapon by activating the crystal charge process. Upon completion a powerful sonic blast is channeled down a long and thin focusing chamber directly onto the enemy itself. The impact is powerful enough to blow holes large enough to put a bolter through in a Space Marine's armor.
Sonic Lances may only be used on a turn in which their bearer charges. They grant +2S, ignore armor saves, and reduce the I of any model wounded but not killed to 1. Vehicles suffer an automatic 'crew stunned' result in addition to any result rolled on any glancing or penetrating hit.
Razor Talons
A set of artificial claws mounted on a gauntlet, the razor-serration on these wicked talons make them brutally effective at tearing flesh and bone apart
Models with Razor Talons gain +1S and reroll any failed rolls to wound in close combat.