Stinger

Innovation. Efficiency. Style. KSI rolls them out as you've never before experienced with  Stinger, the all-new transformable  drone produced on and exclusively for the  Earth market. Improving on our  competitor's efforts, Stinger specialises in serving all your sabotage needs. [1]  A combination of years of KSI's intensive engineering research with the cutting-edge styling of their partners at  Pagani Automobili, Stinger is as beautiful as it is functional.

Titan Magazines Age of Extinction comics
Following a breakout at KSI's laboratories, Stinger disguised himself as Bumblebee and attacked a power plant, hoping to draw out the Autobot. He subsequently headed into a nearby forest, and set fire to an occupied house to attract Bumblebee's attention. As the Autobot attempted to rescue the house's occupant, Stinger punched him into a tree, and welded Bumblebee's battle mask down to render the two of them identical. A brief battle ensued, ending whenOptimus Prime arrived. Stinger mimicked Bumblebee's beeping to confuse the Autobot leader, but he was able to identify his real comrade when the scout dived to save the human from a fall. His cover blown, Stinger pulled a gun on Optimus, but had it knocked from his hand, and quickly fled the scene.

Age of Extinction film
 When Galvatron revealed his true nature and commandeered KSI's man-made Transformer army, Stinger was among the many drones deployed in Hong Kong to seize the Seed. Stinger pursued Bumblebee and the other Autobots, and eventually engaged his yellow doppelganger and Strafe in the ensuing battle. Both he and Bumblebee fought on the Dinobot's back as Strafe flew through Hong Kong's cityscape, but Bumblebee eventually defeated him by impaling his head with his gun's blade, before shooting him, blowing his head and upper body apart, while the remains flew into a bus, or onto the ground. Strafe happily gnawed on Stinger's decapitated head, while a smug Bumblebee remarked he "hates cheap knock-offs".In its first field trial, Stinger was deployed alongside Galvatron to chase down and apprehend the Autobots. During the battle, Stinger fired one missile at the Autobots, which missed. He pursued the other Autobots, but his role was mostly overshadowed by Galvatron's free will and relentless pursuit of Optimus Prime. He was later recalled once Prime was incapacitated and shipped to China, to avoid the feds discovering KSI's prototypes.