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The M240 machine gun, officially the Machine Gun, 7.62 mm, M240, is the U.S. military designation for the FN MAG, [6] a family of belt-fed, gas-operated medium machine guns that chamber the 7.62×51mm NATO cartridge. [1] The M240 has been used by the United States Armed Forces since the late 1970s.
It combined the GM chassis with a modified version of the 240 mm M240 mortar, the 2B8 developed by Yuri N. Kalachnikov at the Perm Machine Building Plant. [1] It was introduced into the Soviet Army in the early 1970s as the 2S4 Tyulpan ("Tulip"), reaching full operational status in 1975, being designated by Western intelligence as the M-1975 ...
The Soviet 240 mm mortar M240 is a 240 millimeter (9.4 in) breech loading smoothbore heavy mortar that fires a 130 kilogram (290 lb) projectile. It entered service in 1953. It entered service in 1953.
A pallet of "8-inch" concrete blocks An interior wall of painted concrete blocks Concrete masonry blocks A building constructed with concrete masonry blocks. A concrete block, also known as a cinder block in North American English, breeze block in British English, or concrete masonry unit (CMU), or by various other terms, is a standard-size rectangular block used in building construction.
This is not merely an improved version of the Xbloc, rather it is a block that functions differently, and has its own advantages and disadvantages. The XblocPlus needs to be placed regularly and, has characteristics found in placed blocks such as natural basaltic columns or concrete placed blocks like Basalton. [10]
The ultimate strength of concrete is influenced by the water-cementitious ratio (w/cm), the design constituents, and the mixing, placement and curing methods employed.All things being equal, concrete with a lower water-cement (cementitious) ratio makes a stronger concrete than that with a higher ratio. [2]
M240B – 7.62×51mm medium machine gun used by infantry, and light vehicles and helicopters. Mk48 Mod 1 – 7.62×51mm light machine gun, used by US MARSOC. M249E4 – 5.56×45mm light machine gun, infantry support weapon. Not replaced, but being supplanted by the M27 IAR.
Modern concrete mix designs can be complex. The choice of a concrete mix depends on the need of the project both in terms of strength and appearance and in relation to local legislation and building codes. The design begins by determining the requirements of the concrete.