Marked 1907-15, has the 5-shot magazine upgrade, making it an M16. The transition period was apparently full of M16 marked guns being made with 3-shot mags and M1907-15 guns getting 5-shot mags.

Solid shooter, I do not have any en blocs.

$400 OBO, trades below.

Buyer must have a VA DL and valid carry permit.

Trades:
Glock 17 (gen 3, 4, 5, or 6)
Glock 36
MP5 mags
Acro P2
Holosun Iris 3 (+cash on my end)

Feel free to send other trades as well, worst I can do is say no.

DM with cell # for pics.