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Externally the "Veresk" is similar to the Uzi; 20- or 30-round magazines are inserted into the pistol grip. There are two AK-style control levers on both sides of the receiver: the right one is the safety switch, the left is a fire-mode selector. The cocking handle is on the right side and is fixed to the bolt carrier, so it moves during firing.
Rate of fire may also be affected by ergonomic factors. For rifles, ease-of-use features such as the design of the bolt or magazine release can affect the rate of fire. For artillery pieces, a gun on a towed mount can usually achieve a higher rate of fire than the same weapon mounted within the cramped confines of a tank or self-propelled gun ...
A larger cartridge produces more recoil and makes it harder to control in fully automatic fire. To mitigate the excessive recoil, Heckler & Koch designed the UMP to have a cyclic rate of around 600 rounds per minute, though the rate of fire increases up to 700 rounds per minute if ammunition is used. [3] [11]
The pistol is named for the 5.7×28mm cartridge's bullet diameter, and the trademark's capitalization style is intended to emphasize the manufacturer's initials—FN. [14] The Five-seven pistol was developed in conjunction with the FN P90 personal defense weapon and the FN 5.7×28mm cartridge. [15]
The basic (original) is the Block 0, equipped with first-generation, solid-state electronics and with marginal capability against surface targets. The Block 1 (1988) upgrade improved radar, ammunition, computing power, rate of fire, and an increase in maximum engagement elevation to +70 degrees.
The distinctive size of the integral suppressor gives it a unique handguard design, with a modified charging handle to account for it. The MP5SD has a rate of fire of approximately 800 rounds per minute, and is intended for use with both standard and subsonic ammunition. [36] Standard MP5SD with no stock and the "SEF" or "Navy" trigger group. [34]
It has a cyclic rate of fire of 850 rounds per minute (RPM). [6] [7] The MPX is also available with different barrel lengths, ranging from 114 to 406mm (4.5- to 16-inch). [8] The MPX submachine gun is only available for military and law enforcement use, while a semi-automatic only version is also available for the civilian market.
The adverse setting increases the cyclic rate of fire from 700–850 rounds per minute to 950–1,150 rounds per minute and is used only in extreme environmental conditions or when heavy fouling is present in the weapon's gas tube.