I've been eying GBB rifles for a while, mostly the M4's. I've really been wanting a bit more realism in my game, and these rifles just seem to fit the bill really well.
Now I may be wrong on this one (probably am, this is just coming from a few articles I read), but aren't GBB rifles, in their entirety, simpler than an AEG? No gears, pistons, cylilders, shimming, etc, to worry about. Like I said, I may be wrong, but it's just a thought. And since I'm really not a technically inclined person, it seemed like a good solution to my constant gear/cylinder/hop-up problems I have in my AEG. Is this true? Or am I just being derpy derpy with this one?
However, I've been trying to weigh all the positives and negatives as objectively as possible, and this is what I've come up with.
PROS:
-Realism
-Relative reliabilty in performance, at least in warm weather
-Easier to repair/work on (once again, just my thought)
-Some parts are AEG compatable
CONS:
-Magazines are damn expensive, even the cheap ones
-Doesn't work during cold weather
-Repair parts may not be as easy to come by if needed
-Have to learn to play differently to accomodate for lower magazine capacity. (I'm not a spray-and-pray guy, but still. A 120 round midcap is a lot different than a 50 rounder)
My plan, if I do decide to get one of these guns, is to use my TSD shotgun during the fall and winter, or whenever the weather calls for it. I actually had to do this during Conflict Europe, since my AEG took a dump on me. And I learned that changing up play style with a spring weapon is actually...a lot of fun! Sure, I may not be getting those far shots, but it's a good challenge to try and sneak up on a guy close enough to tag him with a $60 springer.

The GBB I was looking at primarily was the AGM M4, due it's cost and, at least from what I had gathered, performance compared to a WA/G&P. Yes, it may not be AS good, but with some TLC and time, I'm sure it could be a skirmashable rifle.
I've heard the main problem with the AGM, however, is it's hop-up system and gas consumption. Could the last problem be due to the mag, or is it something internal?
I realize that changing to a GBB may not be as common or economical in the long run, but after shooting a few I was really hooked on the idea. My play may be affected, but maybe that's something worth dealing with.
What are your thoughts? Is there anything I should know about the AGM specifically?
Whew, long post. Anyway, thanks for reading and any constructive criticism is welcome!