With the 10 year anniversary of Red Jacket approaching, Will looks back on how far Red Jacket has come. To celebrate, Will decides to build a 3-in-1 M16 machine gun "triamese" as his Anniversary present; meanwhile Stephanie secretly organizes a surprise party; however, an error made by Kris is going to make it more difficult than expected as people begin showing up by the numbers before the celebration. An unexpected object falls out of an antique gun repair, which turns out to be a tooth. Will's surprise party goes off with a bang.