Put together what's considered the end game sniper rifle, the, single shot bolt action and while it's deadly as hell (a head shot will do 130% damage on a full hp non shielded guy) the problem is if you miss, odds are you're going to get raped during the slow ass reload. Eventually based on advice I switched from bolt back to shell loading. If you're using all level 1 gear and you want a 1 hit headshot rifle, you'll need bolt action + headshot barrel, and IMHO they're both garbage. By using shell loading instead of bolt you have a 10 round clip, and while slightly weaker than bolt, you have options if you miss. And headshot barrel is just ass, you have to hit them in the head, body shots are weaker than sniper barrel. If you can quickly aim down the scope and drill a guy in the head from across the map like a baus, then by all means go bolt + headshot, but understand as I said if you miss, you're going to be getting lip up immediately after.
Have a launcher with trip-barrel, flak spread, and fire rounds and holy fuck that gun is funny as all hell. On the domination/conquer maps when all 4 guys on the other side are crowding the point, you lob those 3 rockets into the center of them and the flak napalms the ground in a 20' radius you can't help but feel super cheap as they're burning alive and spamming chat with "You cheap fuck!".
Fuck it, don't care, it got the job done.