This version sidearm is still my favorite. I've always preferred this design over the standard Newrod spear gun model since first seeing it accessorizing the 1/6 scale, Japan exclusive Marmit Fett Action Figure nearly 2 decades ago. Side Show Collectibles is calling it the "Sacros K-11 Rifle Blaster" -Cool!
I still have one of my original castings I made of this Marmit version, In fact I contributed one for The Jeremy Bulloch Project back in 2008. I plan to use that same sculpt as the foundation for a brand new sculpt while incorporating the Newrod spear gun handle into this updated version. Keep you posted.