There's really nothing anywhere about a AR6400LBL on the web...
Now crossing fingers that it's really a AR6400L with the brushless ESC built-in. It's driving an Eflite 180 (30W), so it could be 5amps.... No more brushed motors that have a relatively short life. No more "where do I stick that ESC without getting in the way of the servos...."
So, let's go AR6400"L
Qman, you should change your title to something like: "UM beast by Eflite, now you're talking". Otherwise, in about an hour there will be 3 more threads about this nice plane.
BTW, the 180 brushless motor is "ideal for 3D models 2–3 oz (55–85 g), and sport and scale models 3–6 oz (85–170 g)" while the flying weight for this little beast is only 67g. Tons of power!