Aimpoint CompM2
The Aimpoint CompM2 is a reflex sight without zoom the Swedish manufacturer Aimpoint AB.
It is standard in the U.S. Army. It is there as M68 Close Combat Optic ( M68 CCO; NSN: 1240-01-411-1265 ) or referred to as M68 Aimpoint. It was designed specifically for the M16/M4-Familie, but can also be used for other rifles with the Picatinny rail. The destination point is also compatible with night vision goggles, rifle scopes and goggles.
Survey
The visor is waterproof up to 25 meters water depth and runs a 3-volt lithium battery type 2L76 or DL1/3N. The brightness of the point can be adjusted for better visibility and longer life of the battery.
The M68 is at a distance of about 50 meters Parallax. That is, that of the red dot regardless of the position of the eye, always pointing at the target. The closer but the goal, the more deviates from the red dot from the actual target.