Hey i'm trying to find the .50 cal sniper rifle but i can't. Can anyone tell me where to get one?

Above lvl 20 veteran rangers carry it , or you can buy it from the gun runners near vegas when they have it in inventory.

Free one in Camp Mcarren too - in the tent with all the sniper recon guys, on one of the top bunks. Don't even get dinged for "stealing" if you take it.

where the crap do you find the 12.7 stuff?