Here, you'll have to change your approach when it comes to capturing these Recon Stations. The first thing you'll need to focus on is taking down the Recon Gun, because these little guys can kick serious butt. Now it's quite plausible to capture a Recon Station while the Recon Gun is up and active, but this is usually not recommended. I laser and fire from long range. A Mark IV, though more powerful, requires that you get within the Recon Gun's firing 360 degree firing radius, so unless you absolutely have to get close, we recommend you keep your distance with the Mark II or lower.
Some players even use missiles and shells to take a gun down.
Once the gun is down, the Recon Station is ripe for capture. Remember, though, that this is an enemy Recon Station, so once you're within its proximity, you'll have to work quickly lest you get drained of power. The tank you choose to do the deed should depend on the situation. Whatever you decide on, make sure your teammates are around to fend off attacks. If you're on your own, make sure you've got a plan of escape.