Maybe add a crossbow that uses sniper ammo or its own ammo type?

@Sir_Named Something doesn't necessarily have to be futuristic to fit in. I mean I should know, I play games about space ninjas using photon bolt and heat seeking firing flak cannons, and still run around with a normal bow that deals humongous damage.

And a crossbow or a normal bow could be a nice alternative to normal weaponry, especially because crossbows and bows in general still deal devastating damage. Plus, they're mostly silent, so it would be the stealthy approach to the game.

But if you want to keep the 'futuristic vibe', you can also energize the arrow to have 'more power' or something.

@Peri_Longbow_plz Well, it does kind of have to fit the general vibe of Apex. I'm not sure what game you're playing that has ninjas using flak cannons and a bow, but it sounds more like a game that's either at least a little goofy, or the writers have taken a lot of liberties.
Now that I've looked it up, I'm guessing you mean Warframe. The thing with Warframe is that it is set in a really futuristic time, which allows the devs to take a lot of liberties. Apex is less futuristic, and it already is part of the Titanfall universe.
Energizing the arrows would probably be the best way to implement this, as a regular bow wouldn't really work.