HOW IT WORKS IN 1.62 STABLE: >>

1. Go to editor, drag NATO Ammo Bearer (B_Soldier_A_F) and Supply Box [AAF] (I_supplyCrate_F) to ground (or use the mission attached), save the mission.
2. Test the mission locally in Editor
   • Drop PCML Missile and the .338 and 7.62 magazines.
   • Go to crate, drag MK20 to backpack, one 5.56 magazine to clothes and one to backpack
   • Try to swap the MX to MK20, notice it swaps the guns without any problem.
   • With MX in hands and MK20 in backpack, fill your inventory with 5.56 magazines.
   • Swap the guns again. Notice how it equips the MK20, but throws MX to ground and moves all the MX magazines to backpack. Observe there are now 17 30rnd MX magazines in backpack.
   • Start dragging MX magazines back to your vest. Notice only after you’ve dragged 4 magazines, the white fill bar in your backpack starts reducing, therefore your backpack is overloaded with items.
3. Restart the mission locally in Editor
   • Drop the Carryall, pick up Field Pack (Olive) from the crate.
   • Drag MK20 to backpack and pick up nine 5.56 magazines
   • Try to swap the MX to MK20, notice it again swaps the guns without any problem.
   • With MX in hands and MK20 in backpack, fill your inventory with 5.56 magazines.
   • Swap the guns again. Notice how it equips the MK20, but throws MX to ground and moves all the MX magazines to backpack. Observe there are now 11 30rnd MX magazines in backpack.
4. Start the mission on a multiplayer server
   • Drop PCML Missile and the .338 and 7.62 magazines.
   • Go to crate, drag MK20 to backpack, one 5.56 magazine to clothes and one to backpack
   • Try to swap the MX to MK20, notice it swaps the guns without any problem.
   • With MX in hands and MK20 in backpack, fill your inventory with 5.56 magazines.
   • Swap the guns again. Notice how it equips the MK20, but throws MX to ground and moves all the MX magazines to backpack. Observe there are now 17 30rnd MX magazines in backpack.
   • Start dragging MX magazines back to your vest. Notice only after you’ve dragged 4 magazines, the white fill bar in your backpack starts reducing, therefore your backpack is overloaded with items.
5. Restart the mission on a multiplayer server
   • Drop the Carryall, pick up Field Pack (Olive) from the crate.
   • Drag MK20 to backpack and pick up nine 5.56 magazines
   • Try to swap the MX to MK20, notice how it drops MX to ground and deletes all the MX magazines
6. So in conclusion regarding version 1.62, if during a multiplayer match you swap your backpack to a smaller one, it breaks the gun swapping from backpack and starts deleting your ammo. This is obviously very annoying in game modes such as Battle Royale which involves lots of equipment swapping.

<< HOW IT WORKS IN 1.62 STABLE

HOW IT WORKS IN DEV 1.63.137926: >>

1. Use the mission attached, with NATO Ammo Bearer (B_Soldier_A_F) and Supply Box [AAF] (I_supplyCrate_F) .
2. Test the mission locally in Editor.
   • Drop PCML Missile and the .338 and 7.62 magazines.
   • Go to crate, drag MK20 to backpack, one 5.56 magazine to clothes and one to backpack
   • Try to swap the MX to MK20, notice it swaps the guns without any problem.
   • With MX in hands and MK20 in backpack, fill your inventory with 5.56 magazines.
   • Swap the guns again. Notice how it equips the MK20, but throws MX to ground and moves 1 MX magazine from your clothes and 5 MX magazines from your vest. Observe there are now 12 30rnd MX magazines in backpack.
3. Restart the mission locally in Editor
   • Drop the Carryall, pick up Field Pack (Olive) from the crate.
   • Drag MK20 to backpack and pick up nine 5.56 magazines
   • Try to swap the MX to MK20, notice it again swaps the guns without any problem.
   • Swap the guns again. Notice how it equips the MK20, but throws MX to ground and moves 1 MX magazine from your clothes and 5 MX magazines from your vest. Observe there are now 6 30rnd MX magazines in backpack.
4. Start the mission on a multiplayer server
   • Drop PCML Missile and the .338 and 7.62 magazines
   • Go to crate, drag MK20 to backpack, one 5.56 magazine to clothes and one to backpack
   • Try to swap the MX to MK20, notice it swaps the guns without any problem.
   • With MX in hands and MK20 in backpack, fill your inventory with 5.56 magazines.
   • Swap the guns again. Notice how it equips the MK20, but throws MX to ground and moves 1 MX magazine from your clothes and 5 MX magazines from your vest. Observe there are now 12 30rnd MX magazines in backpack.
5. Restart the mission on a multiplayer server
   • Drop the Carryall, pick up Field Pack (Olive) from the crate.
   • Drag MK20 to backpack and pick up nine 5.56 magazines
   • Try to swap the MX to MK20, notice how it drops MX to ground and deletes 1 MX magazine from your clothes and 5 MX magazines from your vest. They disappear and don’t appear in backpack.
6. So in conclusion regarding version 1.63.137926, something has changed in the behavior compared to 1.62. It seems to work better in a sense that it only deletes half of your ammo, but it’s still a problem. Could this be related to “Fixed: Browsing different uniforms, vests or backpacks in Arsenal didn't update the capacity information” in DEV 137921 (11-08-2016)?

<<HOW IT WORKS IN DEV 1.63.137926

Reseach by Tzer & Luddigus