Where can I get the magazines in Fortnite?

I would like to play in Fortnite more often with the hunting rifle (carbine) or with the sniper (AWP). It only annoys me that I have to reload after every shot. So where do I get the magazines from?

Fortnite sucks

There are no magazines in Battle Royale… And they are automatically there in Save the World, so… Maybe understand the game instead of following the hype?

I have now analized the game very well and have come to the decision: I will not follow the hype and in every sniper magazine is unfortunately only 1ne cartridge…