How to Unlock Akimbo CSG-35s in MW4
To get akimbo CSG-35s, unlock the base CSG-35 at Tier 36 of the Season 1 free Battle Pass, level the weapon to 42, then equip CSG Crossfire in the Apex slot. You don’t need Premium or BlackCell.
Steps
Unlock the base CSG-35
Season 1 Battle Pass, free track, Tier 36.
Level the weapon to 42
This is the CSG-35’s weapon level, not your player level.
Equip CSG Crossfire
CSG Crossfire is the Apex attachment that unlocks at weapon level 42 and gives you the akimbo setup.
Sources
Dot Esports Lists the base CSG-35 as the Tier 36 free reward in the Season 1 Battle Pass.
TheKoreanSavage Explains that weapon level 42 unlocks CSG Crossfire, the Apex attachment for the akimbo setup, at 0:28–0:39.
WZ Loadout Lists the CSG-35 Apex at weapon level 42.
FAQ
Is Tier 73 the akimbo unlock?
No. Tier 73 is a separate blueprint, not the akimbo unlock.