Wow dude. I actually have no idea what most of that lingo is. Especially the sights and such. Is there like and airsoft dictionary haha.

You're in luck, there's this cool site we've been using for years, its pretty well a compendium of human knowledge, its called google. Lol

And the MBUS is overrated, the 600M sight is the greatest rear sight ever lol

Lol thanks buddy! What about yahoo? Or bing? Kidding. Haha I was actually on there a bit last night looking into some of this stuff.
It's kinda scary how much crap there is out there. I must apologize for being a twit but I can think of nowhere better to collect info/ideas/experience then you guys.

Also, I was looking at a VFC "SOPMOD" M4 DX
Not really sure what makes it worth the price tag. What makes VFC so good?

slightly higher quality internals, guaranteed marui spec (so you can upgrade it properly), and a higher quality body which means more accuracy and toughness.

If you want real advice, don't get a gun with gimmick parts. No functional bolt catches, no electric or pneumatic blowback, no recoil engines of any kind.
It's just useless add-ons that break, some of which seriously affect performance at the cost of ever so slightly more realism

This is why I ask people like you. A quick joke to make me feel retarded, and then a trial info. Thanks buddy.
The recoil I admit is just kinda near, but if that's the selling features, I'd but a GBBR