must've been a year ago or so i was subscribed to centerfire systems and they had a retro ar15 (M16a1) parts kit minus the barrel and lower receiver for $299. if i'm correct these are all original parts and i was iffy on it because it did note that some of the parts could be damaged given the price and i didn't want to take the gamble. after building my first ar15 last fall i am more confident in it and would like to attempt to put one together. even if the parts are damaged with enough search i'm sure i could find parts somewhere... anyone know where i can find a kit for a reasonable price? a LGS has kits but wants $500 (no lower receiver) for it and about $800 for an assembled rifle.