You can buy a sling mount that fits onto your stock tube which will allow you to use a single point sling which I personally prefer. I had use a 2pt sling originally but found my AEG to get in the way if I needed to transition to my secondary, a problem I rarely have no with my single point. I think it really depends on what you are comfortable with and your body mechanics.
I use a CA M15A4 proline CQB.
"Hey I'm the first one to say its a great country but its a straaaaange culture. This is a place where gun store owners are given a list of stolen credit cards but not a list of CRIMINALS and MANIACS. And now they're thinking of banning toy guns...AND THEY'RE GONNA KEEP THE F**KING REAL ONES!"
-George Carlin 1937 - 2008 (RIP buddy)