If your a Raze fan, and you need help, ask me as a comment or here. I've got LOTS of tips. Seriously. I know about good snipe spots, campaign help, what weapons you should use, strategies, and much more. Just ask my friends. (Shouldn't the creator of Raze do this? Yeah, I know. Don't comment about that.)
Can't really say the railgun is the alien sniper equivalent...it has less ammo, shoots much, much slower, sometimes just goes through the enemy without any damage, and pierces multiple...It's the closest...