Ha! You thought this was going to be her nether-twixing thing, didn’t you? Which, admittedly, would be cool and I expect the prop replica people to get on this right away.
Nope, this is for the mechanical chunk from the Reaver ship that Kaylee picks up in the movie and fiddles with while talking to Jayne about the captain and life and stuff. According to Joss’s commentary it was Jewel’s idea to work on this part instead of tossing it over the side. The first time I saw the movie I thought it was a catalyzer, which would have been even cooler, but that was just wishful thinking.
Still, not as cool as a battery-operated nether-twixer. C’mon, prop replica people! The fake Mal gun is great, but let’s see something creative!
New, at the Prop Store. Also some production artwork for the weapons.