Anyone have more info or actually gotten their hands on one of these?
Sua Sponte,
Prib

Marines Name Trijicon ACOG Official Rifle Combat Optic
The Trijicon ACOG riflescope (Advanced Combat Optical Gunsight) has earned the singular distinction of being named the first-ever Rifle Combat Optic (RCO) of the United States Marine Corps. A multi-year contract was awarded to the Michigan-based optics manufacturer in August, 2004. The RCO will be mounted to the M16A2, M16A4, and the M4A1 carbine to enhance the Marines’ ability to identify and accurately fire upon targets from muzzle to 800 meters.

The TA31RCO will be a slightly modified version of the TA31F 4x ACOG. The Corps currently has approximately 6,000 of those models in service. The new model will incorporate Trijicon’s exclusive dual-illuminated red chevron-shaped reticle and bullet drop compensator. In low light or at night, the chevron is brightly illuminated by tritium; in daylight, a fiber optic system collects ambient light and helps ensure daytime brightness and controlled contrast. The system is totally battery-free. A new Target Reference System will allow a rifleman to quickly and accurately reference the location of a target and communicate that location to fellow Marines. The TA31RCO will also feature Trijicon’s highly advanced Bindon Aiming Concept (BAC), an optical breakthrough that permits a both-eyes-open shooting method that greatly increases hit ratios in fast moving Close Quarter Battle (CQB) scenarios. The TA31RCO will be available for civilian sales at a later date.

According to Major General J.N. Mattis, Commanding General of the 1st Marine Division during Operation Iraqi Freedom: “The ACOG mounted on the M16 service rifle has proven to be the biggest improvement in lethality for the Marine infantryman since the introduction of the M1 Garand in WWII.”