How to Unlock the Lachmann Sub (MP5) in MW2 Beta & Best Loadout Guide Posted on 18 September 2022 by Nevesar Best Lachmann Sub (MP5) Loadout Build in MW2 - How to Unlock, Perks, & More If you want to get your hands on the Lachmann Sub early in MW2 and rock its best loadout, here's everything you need to know. Gaming Intel