After studying every available image of the V3 including the ones that were taken when I held the prop in my own hands, I come to the conclusion that emitter and grenade on the V3 (as it exists today) are separate and are held together via a metal rod or a piece of metal pipe. Personally, I tend to believe it‘s a piece of metal pipe which is held in place by one bigger grub screw in the emitter ring and one smaller grub screw in the grenade stabilizer section right below the emitter.
What really wonders me is that we haven‘t seen any evidence so far that a metal drive shaft or metal rod is sticking out from the V2 and the V3 emitter where a stunt blade would slip over. We have seen that on the Vader MOM saber („DV6“), but that‘s a different story. When the blade flies off of Lukes saber during the fight with Vader in the throne room, I am under the impression that the flying stunt blade has a „tang“ section below the ring. If this is really the case, the Luke stunt saber used in this particular scene had either a one-piece emitter/grenade section, or emitter and grenade were held together by a metal pipe.
What really wonders me is that we haven‘t seen any evidence so far that a metal drive shaft or metal rod is sticking out from the V2 and the V3 emitter where a stunt blade would slip over. We have seen that on the Vader MOM saber („DV6“), but that‘s a different story. When the blade flies off of Lukes saber during the fight with Vader in the throne room, I am under the impression that the flying stunt blade has a „tang“ section below the ring. If this is really the case, the Luke stunt saber used in this particular scene had either a one-piece emitter/grenade section, or emitter and grenade were held together by a metal pipe.