1998-2001

LE 002235 roll marked COLT'S MFG CO. INC, old style buttstock marked, modern M4 /nut/buffer with four position receiver extention

LE 0023XX black finish, CAF upper forge code, splinter A-9 carry handle forge code, old style buttstock marked "1 N", modern M4 /nut/buffer with two position receiver extention, mag fenced lower, small pivot pin hole, weep hole not drilled, large trigger pins, enhanced SPORTER bolt carrier, blue extractor buffer, bolt marked MPC, roll marked COLT'S MFG CO. INC, no pinned in sear block, LEO roll markings, blue lable box, peel washer, no "T" numbers, M4 feedramps in the white (after the black anodization), M4 barrel extension, barrel stamped 5/98, purchased NIB in 1999, Bag: blue plastic bag with small white serial number sticker, but no dates anywhere on it (no "Birthbag").

LE 004XXX (lower only) black finish, old buttstock, M4 receviver extention/nut/buffer, large trigger pins, roll marked COLT'S MFG CO. INC, LEO roll markings

LE 00XXXX black finish, upper forge code?, carry handle forge code?, old style buttstock, M4 receviver extention/nut/buffer, mag fenced lower, small pivot pin hole, weep hole drilled, large trigger pins, SPORTER bolt carrier?, extractor buffer color?, roll marked COLT'S MFG CO. INC, no pinned sear block, LEO roll markings, blue lable box, reversible side swivel, peel washer

LE 008014 marked SEMI

LE 008093 black finish, old style buttstock, M4 receviver extention/nut/buffer, mag fenced lower, small pivot pin hole, weep hole drilled, large trigger pins, roll marked COLT'S MFG CO. INC, no pinned sear block, LEO roll markings, this one has an aftermarket upper

LE 008733 (lower only) black finish, mag fenced lower, small pivot pin hole, weep hole drilled, large trigger pins, roll marked COLT'S MFG CO. INC, no pinned sear block, LEO roll markings

2002-2004

LE 011497 (lower only) black finish, mag fenced lower, small pivot pin hole, large trigger pins, roll marked COLT DEFENSE, no pinned sear block, LEO roll markings. marked SEMI

LE 015023 HB barrrel, blue label box, M4 buttstock

LE 015024 HB barrrel, blue label box, M4 buttstock

LE 011548 no details

LE 0147XX black finish, "C", Splinter A upper forge code, Keyhole 5 carry handle forge code, M4 buttstock/receviver extention/nut/buffer, small front push pin, large trigger pins, C marked SPORTER bolt carrier, bolt marked MPC, black extractor buffer & gold spring, roll marked COLT DEFENSE, no pinned sear block, LEO roll markings, crush washer, new style swivel, barrel marked C MP 5.56 NATO 1/7. "T" markings, crush washer, M4 feedramps barrel extention - marked "4" at the 3:00 postition

LE 015092 HB barrrel, blue label box, M4 buttstock, crush washer

LE 15915 black finish, M4 receviver extention/nut/buffer, large trigger pins, roll marked COLT DEFENSE, no pinned sear block, LEO roll markings, this one has a replacement buttstock

LE 0160XX black finish, Anchor Harvey (split A) upper forge code, Cardinal carry handle forge code, M4 buttstock/receviver extention/nut/buffer, small front push pin, large trigger pins, C marked SPORTER bolt carrier, bolt marked MPC, black extractor buffer & gold spring?, roll marked COLT DEFENSE, no pinned sear block, LEO roll markings, crush washer, new style swivel, barrel marked C MP 5.56 NATO 1/7

2005-

LE 0181XX black finish, no upper forge code, Cardinal carry handle forge code, M4 buttstock/receviver extention/nut/buffer, small front push pin, large trigger pins, C marked M16 bolt carrier, bolt marked C, black extractor buffer & gold spring?, roll marked COLT DEFENSE, no pinned sear block, LEO roll markings, crush washer, new style swivel, barrel marked C MP 5.56 NATO 1/7

LE 019709 black finish, uppper forge code?, carry handle forge code?, M4 buttstock/receviver extention/nut/buffer, small front push pin, large trigger pins, M16 bolt carrier?, black extractor buffer & gold spring?, roll marked COLT DEFENS,E no pinned sear block, LEO roll markings, crush washer, new style swivel

LE 021XXX black finish, uppper forge code?, carry handle forge code?, M4 buttstock/receviver extention/nut/buffer, small front push pin, large trigger pins, M16 bolt carrier?, black extractor buffer & gold spring?, roll marked COLT DEFENSE, no pinned sear block, LEO roll markings, crush washer, new style swivel

LE 021542 black finish, uppper forge code?, carry handle forge code?, M4 buttstock/receviver extention/nut/buffer, small front push pin, large trigger pins, M16 bolt carrier?, black extractor buffer & gold spring?, roll marked COLT DEFENSE, no pinned sear block, LEO roll markings, crush washer, new style swivel

LE 0222XX black finish, C and keyhole upper forge code, keyhole 10 carry handle forge code, M4 buttstock/receviver extention/nut/buffer, small front push pin, large trigger pins, C marked M16 bolt carrier, bolt marked MPC, black extractor buffer & gold spring?, roll marked COLT DEFENSE, no pinned sear block, LEO roll markings, crush washer, new style swivel, barrel marked C MP 5.56 NATO 1/7

LE 022262 black finish, uppper forge code?, carry handle forge code?, M4 buttstock/receviver extention/nut/buffer, small front push pin, large trigger pins, M16 bolt carrier?, black extractor buffer & gold spring?, roll marked COLT DEFENSE, no pinned sear block, LEO roll markings, crush washer, new style swivel

LE 0223XX black finish, "D" Diemaco, Splinter A upper forge code, keyhole 10 carry handle forge code, M4 buttstock/receviver extention/nut/buffer, small front push pin, large trigger pins, C marked M16 bolt carrier, bolt marked MPC, black extractor buffer & gold spring extractor marked C, roll marked COLT DEFENSE, no pinned sear block, LEO roll markings, crush washer, new style swivel, "T" marked upper, barrel marked C MP 5.56 NATO 1/7, M4 feed ramps extention marked at 3:00, F marked FSB, blue lable box

LE 022XXX black finish, uppper forge code?, carry handle forge code?, M4 buttstock/receviver extention/nut/buffer, small front push pin, large trigger pins, M16 bolt carrier?, black extractor buffer & gold spring?, roll marked COLT DEFENSE, no pinned sear block, LEO roll markings, crush washer, new style swivel

LE 022680 black finish, uppper forge code?, carry handle forge code?, M4 buttstock/receviver extention/nut/buffer, small front push pin, large trigger pins, M16 bolt carrier?, black extractor buffer & gold spring?, roll marked COLT DEFENSE, no pinned sear block, LEO roll markings, blue label box, crush washer, new style swivel

LE 023XXX black finish, uppper forge code?, carry handle forge code?, M4 buttstock/receviver extention/nut/buffer, small front push pin, large trigger pins, M16 bolt carrier?, black extractor buffer & gold spring?, roll marked COLT DEFENSE, no pinned sear block, LEO roll markings, blue lable box, crush washer, new style swivel

LE 025535 black finish, uppper forge code?, carry handle forge code?, M4 buttstock/receviver extention/nut/buffer, small front push pin, large trigger pins, M16 bolt carrier?, black extractor buffer & gold spring?, roll marked COLT DEFENSE, no pinned sear block, LEO roll markings, crush washer, new style swivel

Don't know when the new extractor spring, pistol grip, and box lable came into use.