Re: 50 BMG help
A city and state would help. If you are willing to mail it then there are at least 2-3 shops that are really qualified and at least another dozen that can get you by. If you are fairly young you might search Fiftydriver. Just kidding. I believe Kirby has rather extensive experience with the 50 BMG.
Build a man a fire and you heat him for a day.
Set him on fire and you heat him for life.
Only accurate rifles are interesting.
Gordy and Brady.