Top Gun - Destroy more enemy vehicles than any other player in your team during the battle (at least 6).
If two or more players have destroyed equal amount vehicles, the achievement is granted to the player who has earned more XP for the battle, including additional XP provided to Premium account users. If the amount of XP is equal as well, the achievement is not granted.
As the match started I was in the southwest corner and led the advance up the west road to the northwest part of the map. A Type 59 tier 8 medium and a couple other tanks were close behind. Then as I turned around the corner of the hill an enemy StuG III tank destroyer faced me. We exchanged blows as I pulled back and spotted a PzIV medium supporting him. I took some damage but firepower from me and the friendlies approaching behind killed the two eager enemy tank, with me getting both killing blows.
I let the big Type 59 lead from here, and as I came around the hill to the middle of the north I spotted it trading fire with a couple tanks near the river. I contributed fire and once more got both killing blows. I advanced over the north bridge while the Type 59 ally moved south to deal with the enemy heavy tanks dueling with our heavies in the centre over the objectives. I spotted one artillery (one shot!) and then the next as I come into the northeast (one shot again!). The enemy was clearly beaten with only a couple tanks left, and I moved south onto the east ridge to try and take some high explosive long shots at the last remaining enemy heavies. Target, aim... fire! And the last few percent ticked off.