Uncanny X-Men #276 is a comic book published by Marvel Comics in May 1991. It was written by Chris Claremont and illustrated by Jim Lee, Scott Williams, and Tom Orzechowski. The cover art was also created by Jim Lee.

The issue is titled “Double Death” and is part of the larger X-Men franchise, which follows the adventures of a group of mutants with extraordinary abilities. In this issue, the X-Men are on Chandilar, the Shi’ar homeworld, where they confront Professor X, who has been using Gladiator and Oracle to take revenge on Deathbird. Gambit and Jubilee team up with Deathbird to stop Professor X, but their escape is complicated by Gladiator and his minions. The issue ends with a shocking twist that leaves the X-Men in disarray.  Used.