@EA_Mako I think the biggest drawback is the recoil is drastically different than the other SMGs. Even with the Purple Stabe/Stock. Sure it does more damage but the goal of an SMG is one clip to drop one person and then reload. The 99 and especially the volt can do this really well and we can predict where the recoil is going.
The dual ammo, not really a selling point. It's not like switching from one to the other does anything different. There's plenty of ammo everywhere that you are never hurting for either one. Nearly every deathbox has heavy/light.
All in all it felt like you were trying to fill the void of the select fire on the prowler without giving us the select fire back. You were better off just giving the hop-up back and tune the prowler a bit instead of releasing the CAR.