- Jackknife is a Unicron-allied Mini-Con from the Armada portion of the Unicron Trilogy continuity family.
Jackknife is a member of the Aerial Extermination Mini-Con Team, and a personal attendant to Nemesis Prime. Like an inordinately vicious magpie, he'll swipe anything that catches his eye, and he doesn't care if he has to beat the owner to an Energon-spewing pulp to get it. This puts him at odds with the stealthy Maverick, but Jackknife either doesn't notice or care how his teammate feels, so long as he gets his swag. 
- Japanese name: Jack
Jackknife is never seen as an individual, only as part of the combined Vorpal Saber sword.
- Air Assault Micron (Mini-Con pack, 2003)
- Japanese ID number: MM-17
- Jackknife/Jack is a redeco of the Air Defense Mini-Con Team member Runway, transforming into a Boeing Sonic Cruiser concept jet plane. He also forms the tip to the Vorpal Saber sword, which can be held by any other Transformer that has 5mm fist-holes. This toy is largely identical to the Hasbro "Air Assault" version of Runway, but uses transparent plastic with a hint of purple instead of the Hasbro version's opaque off-white. He came with his partners Maverick and Skull Buster.
- Rampage & Hawk w/ Air Assault Micron (Multi-pack, 2003)
- Japanese ID number: MS-08
- The Air Assault Mini-Cons were also made available in a multi-pack with the Takara release of Wheeljack and Wind Sheer.
- ↑ Official Transformers Collectors' Club site members' section, Micro-Sized Online! Mini-Con Profiles, 5/25/07