Here's the new Tamiya Abrams M1A2. Check the recoil out when it fires. Also immerse yourself in that glorious engine sound
I have to get one of these 
Now, here's the barrel and track recoil on a Tamiya Tiger 1.
Clearly, the gods of RC tanking- Tamiya- even believe that some measure of track recoil, or a chassis shake, ought to accompany the main cannon shot.
While I agree, that HL models tend to jerkin an excessive way, as if they've just had an electric shock, or had an invite to Harvey W.'s hotel suite, they should move a little- especially when most airsoft models have no barrel recoil.
A tank without track recoil to any degree, and also no barrel recoil, is going to be a boring wee tankie if all it does is use its barrel acting as a flashlight...IMHO
I note that Tamiya's M4A3 105mm Sherman is the only Tamiya tank without barrel recoil (I think), but it does have significant track recoil, like a typical HL model. Is that also a tad too much? In its absence there would be hardly any indication of a cannon going off....
