Model 01 upper, has no raised or engraved R & arrow, no forge code, no bevel on front pivot pin lug, old style bevel on rear lug. Model 01 and 02 uppers are different in that the forge seems were machined of inside the carry handle.
This Model 01 upper was well worn, had Victor anodize and coat the inside with SFL for me. It fits real loose on lowers, would need to be used with an accuwedge. Have since found a better upper, so am selling this one for $75 shipped via USPS Priority mail insured.
XM16E1 upper don't have forge codes, have a counter bore on the front pivot pin lug. Colt made these out of a lower grade aluminum then was specified by ArmaLite, and as a result would corroded in Vietnam. I removed this particular upper from a very rough XM16E1 upper half and sent it to Victor to be anodized and the inside coated with SFL in the hopes it could be saved. The corrosion was worse then I thought, so have decided to sell.
This one does not fit loose on lowers. Am asking $25 shipped via USPS Priority mail insured (SOLD)img.photobucket.com/albums/0603/Ekie12091941/4%20sale/xm16E101.jpgimg.photobucket.com/albums/0603/Ekie12091941/4%20sale/xm16E102.jpgimg.photobucket.com/albums/0603/Ekie12091941/4%20sale/XM16e103.jpg
Paypal banned me for being a bad, bad boy (selling gun parts), but do take MO's or cashiers check.