Re: Parts Kits Available as of 12:45est
DSA is king in the FAL world, but they take forever to ship anything. I've ordered parts from them in the past in good times and they work on the order of weeks or months.
Oh yeah, there can be a HUGE difference in lower parts kits! Parked contact areas on triggers (Olympic) or out of spec springs (M&A) or out of spec parts (regarding materials and coatings, even if the dimensions are correct).
I prefer JP Ent. when I can get 'em, and DPMS when I can't, each without trigger groups.