Did you drop it? WOW. I'd replace it with a Vortex V3 keyless.
I have the earlier version...it blows. It blows gas and fumes whenever you open it. I may try the v3 but I'll read some reviews first.
brumanchu,all you need is the outer ring,can't be that much to order,or find a used one. I would give you mine,but I'm not sold on the aftermarket ones yet.