When Samu Qureshi sits down in the middle of his 4,100-square-foot “museum” in Bethesda, the longtime Washington football fan is surrounded by his life’s work.

After a grueling event grind, players can finally use the new Sirin 9mm secondary in Call of Duty: Black Ops 6. This foldable SMG is the first of its kind to reside in the secondary slot, making ...