The Zeiss Conquests are nice scope offer great glass Target turrets and nice Reticles. I’m not a big fun of BDC RETs but for the price you can’t go wrong. For a Tactical scope I would recommend something else. Leupold Mark 4, Vortex PSTs, or Nigthforce. If price was not an issue Premier, USO, or S&B.
If you're into "correctness", for a Mk12 the closest scopes to those issued with the rifle were the Leupold Mk4 MR/T 2.5-8x36 with the M2 turret, LR/T 3.5-10x40 M2, and the NF 2.5-10x24 (which is now out of production, superseded by the 2.5-10x32).