Ok so I'm new to airsoft and honestly on a pretty tight budget (80-ish - 100ish). I really want a G36 type of but the only way I can see getting a decent G36 with a metal gearbox is getting one used. This is where the CPO Box from Airsoft Megastore (http://www.airsoftmegastore.com/13126-cpo-airsoft-guns-mystery-box.aspx) comes in. So the reason I'm hesitant is A) Because its a used gun and B) Because a lot of people seem to dislike AMS and I've read quite a few stories about things like this backfiring. I understand that buy buying a CPO Box I run the risk of it not working but I've also read that AMS's customer service will help out over the phone with repairs if it doesn't work. While that is really a worst-case scenario I could also see it as being somewhat useful as I would get some experience "under the hood" of an airsoft gun, so to speak. Basically, TL;DR: Should I even consider buying an Airsoft Megastore CPO Mystery Box (http://www.airsoftmegastore.com/13126-cpo-airsoft-guns-mystery-box.aspx) while fully understanding the risks or just not bother. Thanks!