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The Lusa marries some concepts from the HK MP5 and Uzi submachine gun without being too similar to either. The complete trigger housing is nearly identical to that of the MP5, however the other internals are greatly simplified. The bolt and carrier are one welded unit, and the action is a simple blowback, unlike the roller-delay system of the MP5.
The iterative procedure involves firing a group of shots from a cool gun barrel, then determining the geometric center of the shot pattern, adjusting the sights to move the point of aim to that group center, and repeating the process until further groups consistently center on the point of aim.
Natural point of aim is not achieved if the shooter must apply pressure to the firearm so the sight picture is on target. One of the main advantages of natural point of aim is that it minimizes fatigue when shooting a long course of fire. Over time, the shooter learns to assume the correct position quickly, allowing for accurate fire immediately.
A rear sight with a larger aperture than 1.2 mm (0.047 in) is not strictly a diopter sight, but nonetheless is still often (incorrectly) referred to as such. With larger aperture sights the shooter must make a conscious effort to center the eye in the rear sight for precise aiming.
The barrel has a chrome-lined bore with 6 right-hand grooves and a 178 mm (1:7 in) rifling twist rate that is optimized for use with heavier SS109 5.56×45mm NATO rounds. A barrel with a 305 mm (1:12 in) twist rate designed specifically to stabilize the lightweight M193 cartridge is also available. [2]
The conversion reduced the MP5's rate of fire to 650 rounds per minute. It was ultimately replaced by the MP5 .22 LR in 2021. MP5 6.5×25mm Rechambering Kit Rechambering kit to convert an MP5 to 6.5×25mm CBJ, which was proposed in the 2000s but never released. It would have allowed an MP5 to be rechambered simply by switching its barrel.
Historically, RUC officers were issued with the Ruger Speed-Six revolver from 1979 onwards and had access to the Sterling submachine gun and the Ruger AC-556 select-fire rifle until these were replaced by the Heckler & Koch MP5 submachine gun and the Heckler & Koch G3 and Heckler & Koch HK33 [91] rifles between 1992 and 1995, with the PSNI ...
Semi-automatic pistol: 9×19mm Parabellum Germany: USP9 Compact: In use with police divisions in the states of Sabah and Sarawak. [2] Tara TM-9: Semi-automatic pistol: 9×19mm Parabellum Montenegro [3] USP: Semi-automatic pistol: 9×19mm Parabellum Germany: USP9 Tactical: Used by Special Action Unit (UTK) and 69 Commando of PGK. [2] Mark 23 ...