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The Rheinmetall 120-millimeter (4.7 in) gun is a smoothbore tank gun designed and produced by the German Rheinmetall-DeTec AG company. It was developed in response to Soviet advances in armor technology and development of new armored threats. With production beginning in 1974, the first version of the gun, known as the L/44, was used on the German Leopard 2, and was soon exported to be used on tanks such as the American M1 Abrams tanks. It has also been exported to South Korea and Japan, as well as nations which have procured the Leopard 2 and the M1 Abrams. Rheinmetall's 120-millimeter (4.7 in) L/44 tank gun has a length of 5.28 meters (5.77 yd), while the gun system weighs approximately 3,317 kilograms (7,310 lb). However, by 1990 the L/44 was not considered powerful enough to deal with modernized Soviet armor, such as the T-80B, which stimulated an effort by Rheinmetall to develop a better main armament. This first revolved around a 140-millimeter tank gun, but later turned into a compromise which led to the development of an advanced 120-millimeter gun. This gun was the L/55, based on the same internal geometry as the L/44 and installed in the same breech and mount. The L/55 is 1.3 meters (1.4 yd) longer, allowing for an increase in muzzle velocity for ammunition being fired through it. This gun was retrofitted into German and Dutch Leopard 2s, and chosen as the main gun of the Spanish Leopard 2E and Greek Leopard 2HEL. A variety of ammunition has been developed for use by tanks armed with Rheinmetall's tank gun. This includes a series of kinetic energy penetrators, such as the American M829 series, and chemical energy anti-tank warheads. Recent ammunition includes a wide range of new anti-personnel rounds and demolition munitions, giving tanks armed with Rheinmetall's tank gun greater versatility on the modern battlefield. The LAHAT, developed in Israel, is a gun-launched missile which has received interest from Germany and other Leopard 2 users, and is designed to defeat both enemy armor and enemy combat helicopters. The Israelis also introduced a new anti-personnel munition, which limits collateral damage by controlling the fragmentation of the projectile when fired. [READ THE REST OF THIS ARTICLE]

The Space Shuttle Solid Rocket Boosters (SRBs) are the pair of large solid rockets used by the United States' NASA Space Shuttle during the first two minutes of powered flight. The two reusable SRBs provide the main thrust to lift the shuttle off the launch pad and up to an altitude of about 150,000 ft (28 mi; 46 km). While on the pad, the two SRBs carry the entire weight of the external tank and orbiter and transmit the weight load through their structure to the mobile launch platform. Each booster has a liftoff thrust of approximately 2,800,000 pounds-force (12.5 MN) at sea level, increasing shortly after liftoff to about 3,100,000 lbf (13.8 MN). They are ignited after the three space shuttle main engines' thrust level is verified. Seventy-five seconds after SRB separation, SRB apogee occurs at an altitude of approximately 220,000 ft (42 mi; 67 km); parachutes are then deployed and impact occurs in the ocean approximately 122 nautical miles (226 km) downrange, after which the two SRBs are recovered. The SRBs are the largest solid-propellant motors ever flown and the first of such large rockets designed for reuse. Each is 149.16 ft (45.46 m) long and 12.17 ft (3.71 m) in diameter. Each SRB weighs approximately 1,300,000 lb (590,000 kg) at launch. The two SRBs constitute about 60% of the total lift-off mass. The propellant for each solid rocket motor weighs approximately 1,100,000 lb (500,000 kg). The inert weight of each SRB is approximately 200,000 lb (91,000 kg). Primary elements of each booster are the motor (including case, propellant, igniter and nozzle), structure, separation systems, operational flight instrumentation, recovery avionics, pyrotechnics, deceleration system, thrust vector control system and range safety destruct system. While the terms 'solid rocket motor' and 'solid rocket booster' are often used interchangeably, in technical use they have specific meanings. 'Solid rocket booster' applies to the entire rocket assembly, which includes the recovery parachutes, electronic instrumentation, separation rockets, range safety destruct system, and thrust vector control. The term 'solid rocket motor' applies to the propellant, case, igniter and nozzle. Each booster is attached to the external tank at the SRB's aft frame by two lateral sway braces and a diagonal attachment. The forward end of each SRB is attached to the external tank at the forward end of the SRB's forward skirt. On the launch pad, each booster also is attached to the mobile launcher platform at the aft skirt by four frangible nuts that are severed at lift-off. The boosters are composed of seven individually manufactured steel segments. These are assembled in pairs by the manufacturer, and then shipped to Kennedy Space Center by rail for final assembly. The segments are fixed together using circumferential tang, clevis, and clevis pin fastening, and sealed with three O-rings (two prior to the Challenger Disaster in 1986) and heat-resistant putty. The spent SRBs are recovered from the ocean, refurbished, reloaded with propellant, and reused for several missions. [READ THE REST OF THIS ARTICLE]

Introduced in 1990, the Colt Anaconda is a large frame double-action revolver featuring a full length under-barrel ejection-rod lug and six round cylinder, designed and produced by the Colt's Manufacturing Company. Chambered for the powerful .44 Magnum and .45 Colt centerfire ammunition cartridges, the Anaconda marked the Hartford, Connecticut firm’s first foray into the popular large-bore Magnum pistol market. Built on a new and heavier ‘AA’ frame, the Anaconda was brought out to compete with .44 Magnum contemporaries such as the Smith & Wesson Model 29, the Sturm, Ruger & Co. Redhawk and Blackhawk, and the Dan Wesson Firearms Model 44. Considering that many of these models had been marketed and sold for fully 35 years upon its introduction, the Anaconda was a very late entry into the large-bore handgun market. Unlike most other pistols introduced in the 1980s and 1990s, the Anaconda was never offered with a carbon steel blued finish, but was available only in stainless steel. When originally introduced Anacondas were plagued with poor accuracy, but changes to the barrels quickly corrected the problems to the point that Colt billed its new pistol as among the most accurate .44 Magnum revolvers in production. Anaconda revolvers were primarily marketed for sport enthusiast shooters and hunters, as they are too large and unwieldy for law enforcement, self-defense, or concealed-carry. Colt firearms announced the discontinuation of the Anaconda and many other double-action revolver models in October of 1999, although made-to-order limited production versions of the gun continued to be available from the Colt custom gun shop until approximately 2003. [READ THE REST OF THIS ARTICLE]

The MGL (Multiple Grenade Launcher) is a lightweight 40 mm six-shot revolver-type grenade launcher developed and manufactured in South Africa by Milkor (Pty) Ltd. The MGL was demonstrated as a concept to the South African Defence Force (SADF) in 1981. The operating principle was immediately accepted and subjected to a stringent qualification program. The MGL was then officially accepted into service with the SADF as the Y2. After its introduction in 1983, the MGL was gradually adopted by the armed forces and law enforcement organizations of over 30 countries; it has since been used in harsh environments ranging from rain forests to deserts. Total production since 1983 has been more than 50,000 units. The MGL is a multiple-shot weapon, intended to significantly increase a small squad's firepower when compared to traditional single-shot grenade launchers like the M203. The MGL is designed to be simple, rugged, and reliable. It uses the well-proven revolver principle to achieve a high rate of accurate fire which can be rapidly brought to bear on a target. A variety of rounds such as HE, HEAT, anti-riot baton, irritant, and pyrotechnic can be loaded and fired as fast as the trigger can be pulled; the cylinder can be loaded or unloaded rapidly to maintain a high rate of fire. Although intended primarily for offensive and defensive use with high-explosive rounds, with appropriate ammunition the launcher is suitable for anti-riot and other security operations. A newly patented modification allows the MGL to fire less lethal (very low pressure) rounds. In 2005 the U.S. Marine Corp procured 200 US-made Milkor MGL-140s, designating it the "M32 Multiple shot Grenade Launcher" (M32 MGL, or M32 MSGL). They were initially fielded tested in 2006. The US Marine Corps M32 version is equipped with the M2A1 reflex sight. It is a “AAA” battery–powered sight with infra-red settings for night operations. It has Picatinny rail attachment and elevation adjusts in 25 meter increments and compensates for drift. [READ THE REST OF THIS ARTICLE] is not affiliated with or endorsed by wikipedia. wikipedia and the wikipedia globe are registered trademarks of
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