As far as I know for sniper role in this area, unless you getting into a bigger event there isnt really much room for a sniper rifle. Alot of the non private fields around gta are all CQB and having to cock back every time in CQB is fustrating.
Im wanting to get into the sniper role or support gunner role. Both are more my style but both are only good in the bigger games. I've heard from friends and read alot that if you start with a standard AEG you can have abit more fun as you work up and learn the fields and even in the area better then you can with a s.rifle.