Who on Earth would think bringing no spare mags is okay to go heisting with? All akimbos prior to this update had at least two spares mags, but now Overkill went against that on the latest update and had the akimbo MP40 have both the magazine capacity and the total ammo set at 80. I fully disagree with that so here's More Ammo for the Akimbo MP40™!
Total ammo is now 128, meaning you have two spares mags with the MP40 (Magazine size for each MP40 is set to 32 instead of 40 because I refuse to release a mod with the wrong ammo capacity of a real gun and that annoys the fuck outta me)
If you disagree with that decision, you're free to set the mag capacity back to 80 and the total ammo to 160 on the lua file.