It recommended to do this exploit with at least a Level 18 character. Switch weapons as soon as you select the desired special ammo to have it cutoff all animations and instantly be available. You can do this each time you resupply to carry four additional medkits than you normally can carry. You can now remove the Paramedic backpack and Alpha Bridge gear and equip your desired gear. To carry nine medkits instead of the normal five, equip the Paramedic backpack (obtained from the Reward vendor in the Base Of Operations) and two pieces of the Alpha Bridge gear, then open a supply crate. You can do this each time you resupply to carry a lot more ammunition than you can normally carry with the gear you are using. You can now remove all the equipment and equip your normal gear. You can also add mods with extra ammo capacity to the gear for even more ammo.
To easily carry more ammo, equip two pieces of the Lone Star gear, a chest piece with extra ammo capacity as a stat, and either the Police backpack (obtained from the Reward vendor in the Base Of Operations) or a backpack with extra ammo capacity.
Challenge mode greatly increases the difficulty of missions, but it provides much better rewards. Reach Level 30 to unlock the Challenge difficulty for missions, as well as one daily challenge mission and two daily hard missions that reward Phoenix Credits for completion.
