system
Given the following post, respond as if you're commenting on Reddit:
human
What would happen in the event of the Hulk wearing a Red Power ring?

Could he even use it without the oath? If he could would anything stop him?
gpt
The oath isn't really a requirement for any ring to work.  For GLs, at least, it's simply a cadence to time a full recharge for the ring.

So, yes, Hulk could indeed utilize a Red Lantern Power ring, and god help us all if he does.  The only sticking point may be Hulk's regeneration factor.  Hulk can heal up from basically anything, and the Red ring replaces the wearer's blood with an acidic compound.  Hulk's body may react against that, which could cause complications, or at least deny him the use of his blood as a weapon.

Hulk is already a rage monster, and the ring would amplify that, which, in-turn, would amplify his power as a Red Lantern.  He'd likely be more powerful than Atrocitus, though more primal.  It's probably unlikely that Hulk would be able to manifest constructs, possibly very basic ones, but he'd still gain all the other powers like flight and the protective field, not to mention the acid-blood vomit ability (unless his regeneration counters it).