MP9 v MP7 How it work?

Описание: The Brügger & Thomet MP9 (Maschinenpistole 9mm, German for "machine pistol") is a submachine gun chambered for the 9×19mm Parabellum cartridge that is designed and manufactured by Brügger & Thomet.

The MP9 is a selective-fire submachine gun. It uses 15, 20, 25, and 30 round transparent polymer detachable box magazines. It has three safeties: an ambidextrous safety/fire mode selector switch button (manual safety), a trigger safety, and a drop safety. The MP9 is a development of the Steyr TMP. The design of the TMP was purchased from Steyr in 2001. Differences from the TMP include a stock that folds to the right side of the weapon, an integrated Picatinny rail, and a new trigger safety.
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The Heckler & Koch MP7 (German: Maschinenpistole 7) is a personal defense weapon chambered for the HK 4.6×30mm armor-piercing cartridge designed by German defence manufacturer Heckler & Koch.

It was designed (together with the new cartridge) to meet NATO requirements published in 1989, which called for an SMG-type weapon with a greater capacity to defeat Kevlar body armour (versus pre-existing submachine guns using conventional pistol cartridges such as .45 ACP and 9×19mm Parabellum).

The MP7 went into production in 2001, and is a direct rival to the FN P90, also developed in response to NATO's requirement by Belgian company FN Herstal. The weapon has been revised since its introduction and the latest production variants are the MP7A1 and MP7A2.

The proliferation of cheap yet effective soft body armor has begun to make guns that fire pistol ammunition (such as Heckler & Koch's earlier MP5 submachine gun and USP pistol) ineffective. In response to this trend, Heckler & Koch designed the MP7 (along with the cancelled UCP pistol, which uses the same ammunition) to penetrate soft body armor while being small enough to be used in place of either a pistol or a submachine gun.

Source of Wikipedia

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