With the upcoming Season of the Lost.
Destiny 2 is gearing up for the next season on August 24, and the folks at Bungie are already chatting about upcoming features players can expect. Chief among the updates is that primary ammo will no longer be a thing. Starting with Season of the Lost, primary ammo is being removed from the game and all weapons that use it will have an infinite supply of bullets to draw from.
The change does come with a number of alterations to existing weapons whose perks sort of banked on the idea of a limited ammo supply.
Running out of Primary ammo has never been tactically interesting. Running out in hard PvE content or because you were on a tear in PvP was a weird and sometimes frustrating experience that we would like to not subject anyone to in the future.
There are a lot of changes coming with the Season of the Lost, far more than I have the knowledge to explain in this article. So with that in mind I will shuffle you off to the dev blog who can better explain the upcoming changes much better than I can.
Source: Destiny 2