Here is the list
1) Recommended frequent cleaning and issued troops cleaning kits.
2) Forward bolt assist, with tear drop button, on A2's became round button.
3) Different Flash suppressor (note: not a brake or combined unit), A2's bottom slot removed.
4) Chrome-lined the chamber and interior of barrels (makes chambering and extraction easier).
5) Reinforced lower receiver, different take-down pin setup.
6) Addition of 30 round magazines, different follower design, mag case which held (2) gernades & (3) mags.
7) Trap door in butt-stock to hold cleaning kit.
8) Different recoil buffer and different spring, changed cycle rate (slowed it down).
9) Added bolt carrier mass and forward assist notches in bolt carrier.
10) Chrome lined bolt carrier.
11) Extractor spring and buffer strengthened.
12) Stronger Hammer Spring
M16 -> M16 A1
Southeast Vet 70~72.
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