In order to unlock this achievement, you'll need to reach level 60 & spend a total of 226,500 total salvage on characters & weapon attachments. The difference between the 360 version & this one is you also need to purchase the "Hitman Absolution" attachments as well. There are many methods for salvage grinding, but I preferred using Private Rescue on the Beach map. The video shown here gives the best route to farm that salvage (Video is not my own, but is owned by Orxnge).
Edit: Gizmo2k reminded me to include the fact that the General character is not necessary for this achievement.
Edit 2: I should include the fact that any online progress from the 360 version won't transfer to the One version or vice versa (unless a patch or update was released since this was unlocked for me).