User blog comment:Jimi56/Purifier and Sliquifier connections/@comment-1263839-20160201121534

Call of Duty has a large history of reusing assets, especially in regards to cosmetics (most famously the Famas' ironsights in Black Ops being on used on like five guns). As mentioned, it's likely that the Purifier uses the skeleton as the Sliquifier but they just tweaked the visual so they didn't have to create an all new weapon with no animations and what not. I'm fairly certain it uses the exact same texture as World at War's flamethrower but just HDified too.