There's the AMR, which is the only "sniper" in the game imo. But it takes up a stratagem slot and isn't nearly as penetrating as I'd like it to be. I only really use it if I find it laying around in the wild.
Tbh I think the whole game is designed away from a sniper play style, which is a little disappointing. But I'm willing to forgive it with how fun it is otherwise.
Yeah, with the spawn distances and the amount of enemies, there's very little space for a true sniping experience. Plus with the destructible environment, high ground is very rarely guaranteed. Plus, the camera shake mechanics aren't the most conducive to sniping. I do think that if OP wants a more sniper-ey experience, they're in their right to request it since it's a PvE game and the most important thing is to have fun. Maybe they could introduce some more variety into the sniper lineup, like different types of rounds. Or maybe a new planet that's got lots of close spaced high ground where staying at ground level means you get boxed in by enemies