When inside of an ISDF Recycler you can then proceed to fire your weapon, and alert the Gun Towers to your presence. Gun Towers don't always care if they are firing through friendly units, so long as they are able to hit enemy units. Because of this the Gun Towers, if in range of the Recycler, will typically try to blast through the Recycler to kill you, and in turn, will give you the match. This is also effective whenever you are in any structure, even if you are an ISDF troop inside a Scion structure near Scion Gun Spires. I recommend trying it out sometime.
Many people consider steep hills, or sharp inclines, to be barriers.
Because of this they tend to forget to protect these areas of their base. If you learn to 'mountain climb' in your Tank. Most areas in the game, even when they are on top of sharp inclines, can be reached while you are still in your tank. Practice jumping and climbing occasionally in your Tank. Typically you can even find a way to get behind the outer wall on a level, then ride up along the ridges and drop in on an un-suspecting base and Pummel them.