You probably put $500 into your gun after hte initial purchase, correct? WEll with a mag, if you get one new then you dont need to really do anything. Paradigm.
www.themagsmith.com.
16bps easy (legal), 30+ illegal with more pressure. 15- ounce trigge pull (not too light, but not heavy either). Wont really give you any problems with chopping (you can stick your finger in teh chamber and fire away). Umm.. Theres like 5 parts to it. Valve, bolt, rail, frame, sear.