I got my Z7 last week and it has the following: Sword Twilight Hunter 5 pin sight, QAD Ultra HD pro rest, Kwikee Kwiver, and B-Stinger stab.

The B-Stinger is the Sport Hunter 8.5 in. with 11 oz. end weight. It holds very well and the weights can be changed for preference. You want the weight away from the bow to help stabilize and the stinger indeed does that.

BTW, that Z7 is a sweet, smooth shooter ain't it, love mine!!