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The rear sight is a simple diopter with screw adjustment. The body is formed from a sheet of stamped and welded steel. The weapon never enjoyed widespread production, and the project was halted in 1992, at a cost of 2.5 million dollars. The MP5 soon replaced this weapon's intended usage in the Portuguese police forces.
The rear sight is mechanically adjustable for both windage and elevation with the use of a special tool, being adjusted at the factory for firing at 25 metres (27 yd) with standard 8 grams (123 gr) FMJ 9×19mm NATO ammunition.
With tangent sights, the rear sight is often used to adjust the elevation, and the front the windage. The M16A2 later M16 series rifles have a dial adjustable range calibrated rear sight, and use an elevation adjustable front sight to "zero" the rifle at a given range. The rear sight is used for windage adjustment and to change the zero range.
The sight line radius is 602 millimeters (23.7 in). The MG5 was expressly designed to use various types of receiver mounted optical sights as its primary sighting option. Therefore achieving a negligible zero change in practical use between barrel assembly changes was a major design requirement that was not easily met.
The diopter sight is easy to use and usually allows for very accurate aiming, because a relative long sighting line can be used. A long sighting line helps to reduce eventual angle errors and will, in case the sight has an incremental adjustment mechanism, adjust in smaller increments when compared to a further identical shorter sighting line.
The Heckler & Koch UMP (Universale Maschinenpistole, German for "Universal Machine Pistol") is a submachine gun developed and manufactured by Heckler & Koch. Heckler & Koch developed the UMP as a lighter and cheaper successor to the MP5 , though both remain in production. [ 4 ]
This mechanism was employed in CETME's Model A, B, C and Model L series of rifles, and also in the Heckler & Koch G3 battle rifle, HK33 assault rifle and MP5 series of submachine guns. Similarities with the 7.62mm Model C and 5.56mm Model L rifles extend to the interchangeability of certain parts.
The original G3 and G3A1 rifle variants had a relatively low iron sight line that consisted of a Klappvisier, an "L-type" flip up rear sight and hooded front post. From the G3A2 variant the firearm is equipped with a relatively low iron sight line that consists of a Drehvisier a rotary rear drum and hooded front post. The rear sight is ...