Uh...
As for the exact speed that could be reached, he wasn't sure since the Hell Gatling didn't come with a dashboard to provide detailed data. He just felt that the speed wasn't slow, even faster than the average car.
Theoretically, against an ordinary person, he wouldn't even need to shoot; he could just as well kill someone by ramming them with the Hell Gatling.
And after practicing for a while, he had almost gotten the hang of controlling the Hell Gatling with his mind, which should make it possible to carry a passenger.
The maximum distance for telekinetic control was a radius of one kilometer from him, which means a diameter of two kilometers.
That meant as long as the enemy was within a kilometer of him, he could drop the Gatling right above their head at any time, stuff the barrel in their mouth and fire. A pretty good effect, with many potential uses.
At least, the uses were much more numerous than the original defensive turret.