Uncanny X-Force by Rick Remender Omnibus

Rick Remender puts the uncanny into X-Force in an epic, critically acclaimed run!
Psylocke, Archangel, Deadpool and Fantomex sign up to Wolverine's secret squad of assassins, but their first mission - to find and deal with the reborn Apocalypse - casts a long shadow. As X-Force struggles to come to terms with their actions, one among them unravels in what could only be called the Dark Angel Saga. Startlingly familiar Deathloks, a return to the Age of Apocalypse, a warring Otherworld, and the all-new, all-deadly Brotherhood of Evil Mutants await in Remender's extraordinary exploration of the ethics of execution.

Collecting: Uncanny X-Force 1-35, 5.1, 19.1; material from Wolverine: Road to Hell; X-Men: Spotlight