I only tried the Pier 93 Resistence a couple of times with random other players for our team and found myself running out of ammo quickly. I tried to avoid using points to get more ammo to save the points for accessing the next section by switching to other weapons but this was not optimum, using a SMG with lower DPS than my assault rifles and a shotgun. Then I tried using the Lone Star gearset (3 pieces and ninja bag) to reload ammo by holstering my weapon but that didn't function. maybe because I just switched weapons instead of actually holstering the weapon?
What are people doing. Are they using points to load up ammo from the ammo crate in that big open area where the shipping containers are or gearing and modding to hold extra ammo or what?