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Recent Developments In Reflex Sights
Since the start of the Global War on Terror, US forces have adopted a range of optical sights for their individual weapons. Even the US Marines, which steadfastly used iron sights on everything but sniper rifles until a few years ago, has now gone to universal issue for all personnel issued with shoulder weapons as well as putting them on its new SAW, the M27, the old M249 and the M240. The US Army now issues all its soldiers with a red dot sight - currently the Aimpoint CompM4s (M68CCO) and is providing everyone who fights with an M16A4 rifle with a TA31RCO-M150 ACOG.The US Army uses a 3.8X28 Elcan unit, the M145 on its M249 and M240 machine guns - this differs from the original in using internal adjustments and a ballistically compensating reticle in place of the original troublesome external range cam mount.
The development of the sights used by the US military has been almost entirely a private initiative of companies based in the USA, Canada and Sweden. If further proof were needed of the relevance of the 2nd Amendment to the defense of the United States, much of this development was driven by civilian usage and demands. This trend will continue to drive weapon sight development for the forseeable future.
Aimpoint, the defacto Western world military standard in red dot sights, has brought out a new range of very compact and light red dot sights, the Micro range. The Aimpoint Micro T-1 red dot sight is only 2.4 inches long and weighs in at only 3.7 ounces with its thumb nut Picatinny rail mount and battery. That is small enough to replace iron sights without adding weight, or to mount on typical semiautomatic pistols. No matter what weapon you have or mounting configuration you want, Aimpoint or aftermarket suppliers like La Rue Tactical or GG&G will have mounts to match it. Aimpoint's amazing ACET technology can get up to 5 years continuation out of one battery. In combination with flip-to-side or twist off magnifiers like the Eotech G23 it makes an highly compact and versatile system covering targets out to perhaps 400 meters. At greater ranges the 4 MOA dot starts to cover too much of the target.
Not to be left behind, Eotech have vastly reduced the size of their unique holographic weapon sights resulting in the new XPS and EXPS ranges. The battery life problem of the old 'N' battery units has been overcome with the XPS and EXPS running for approximately 600 hours on a singe CR123 battery. Lasers use a lot more battery power than the LEDs used in Aimpoints, but result in a totally parallax free sight picture that can be used should it appear anywhere in the sighting window - even if the rest of the window is obscured by mud or snow or completely shattered. The Eotech avoids the large dot problem by using a 1 MOA dot for fine aiming at longer distances centered in a 65 MOA circle for rapid target acquisition and centering close up. The XPS-2 XPS-3 and EXPS-3 series are inevitably bulkier and heavier than the Aimpoint Micros at 3.5 inches long and 8 to 11 ounces and are possbily less robust, although a new, tethered screw cap with an O-ring makes battery housings spontaneously detaching a thing of the past. The XPS-3 and EXPS-3 are NV compatible, with the EXPS-3s resiting their buttons to the left hand side to enable you to put the NV unit or 3x magnifier right up against the rear sight window. A quick release mount unique to the EXPS series puts the sight 7mm higher for easier co-witnessing of iron sights and compatibility with a greater range of NV units.

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