Go get 'em Maj G ! Marines use the M249 SAW on a squad level. Marines have the M240G (thats Golf) is used by the Weapons Platoon, along with 60mm Mortars and SMAWS. This is how it is in most USMC Rifle Companies. M249 is 5.56mm (same round as M16A2). M240G is 7.62mm (same as MG30). Each Rifle Platoon is assigned an M240G team per squad. I know this is true as I had one attached to my squad at Coronado.
As for the Marines having the "green camo headbands" on their Kevlars, we had them. I had one on my "brain bucket". We were told that we couldn't have the "cats eyes" turned out, because that is how the Army wore them. If Marines did not have these "helmet bands" is was because they lost it, or it was their Company SOP not to wear them.
Also, the Marines are looking into a new weapon, the M4 Assault Rifle. Not sure on any techno, but its a modified M16A2 (?) with a return to full-auto, shortened barrel, and a telescoping butt-stock. I was to be used in a MOUT environment (urban-type). My unit was issued some of these right before I got out. Still firing the 5.56 round, but with a 30-round magazine.
This is from my own experience as a Marine 0311 with Bravo 1/25.
For all those fellow Marines out there......HOORAH !
Robert
SEMPER FI, MARINE