http://www.airsoftcanada.com/showthread.php?t=24187
http://www.airsoftcanada.com/showthread.php?t=22395
Been there, done that. 18+ was always on the table, the recent "complete guns minus a small part" partouts were just the straw that broke the camel's back.
Someone once posted that if someone was meticulous and mature enough to assemble a gun from parts, it shows maturity and all.
You know what shows even more maturity? Waiting until you finally have 18 candles on your cake.