Made this a while ago, but like most things with a niche fanbase, no one gave this poor Cestra a second look. Now here it is, updated for use in the Stud.io program.
I've brick-built this since then, and yes it's life size!
The grip/receiver section is a solid mass of SNOT technique, very sturdy. The barrels however took some tinkering, they're fussy. The gun will hold together on display but you have to support the nose somehow (clear bricks work fine) since it's so heavy.
The barrel does spin freely! But it'll completely destroy itself, like an unbalanced Grineer washing machine haha.