So this new tier 7 british td were getting has some weird armor eh.

Lert: That 200mm is the counterweight because it's a turret made for a 76mm M1A1 gun and they fitted a 17pdr instead. The 17pdr is a much heavier gun with a much longer, heavier barrel.   Sorry, I thought OP was talking about the Achilles. Ignore the comments about the M1A1. It's still a counterweight, though.