Whether you’re looking to make a pile of props to outfit your buddies as a Space Marine Squadron for Halloween, replicate modeling props for your table top games, or cast a copy of your favorite action hero, this how-to casting guide can help.

Shawn Thorsson prop and costume design hobbyist with a passion (check out his jaw-droppingly awesome HALO costumes to see one of his more notable builds). Although his work might seem like magic given how polished the final product looks it’s a lot of dedication and careful planning. In this tutorial he shares his casting process by demonstrating how to clone a large object (in this case a gun from the game Mass Effect 2). The tutorial we’re focused on here is about the molding process; if you’re curious about how he made the prop gun he’s now making a mold of make sure to check out part one of the series here.

Hit up the link below to see how it’s done and get plenty of pointers on molding and casting in the process.

Building the M-3 Predator Heavy Pistol from Mass Effect 2 [Protagonist4Hire via Make]