I think he is talking about the upgrades and what not. Allot of the sniper rifles or hell any AEG in general needs upgrades and tuning to really get more range and acuaracy. Lots of ppl run stock guns, but it's nice to have upgraded ones so you can out shoot others.
Starting with a AEG is really better I think too. Plus most ppl don't end up keeping the first gun they like. Sooner or later you want some thing new or find a certain AEG is not your style.