Great Pictures!
Those Jarheads in a couple of pictures, look like they are in Force Recon.
On the M4, I heard they went to a heavier bullet, rather than the standard ss109. I don't know for sure.
A lot of the units, do issue the M14, with the 7.62 round. This is due to the 5.56 round, not penetrating through all the layering of winter clothing, that the Haji's were wearing. If Jihad-Joe was across a canyon and you try to smoke-check him, you might not get penetration. You'll give him the dam-dam with the heavier round though!
Another good book to read, is "Lone Survivor", by Marcus Lattrell.
Thanks to all who served and continue to serve!
Semper Fi.
Wpns 1/5 (0331)
"Make Peace Or Die!"