Information: - The StG 44 (abbreviation of Sturmgewehr 44, "assault rifle 44") is a German selective-fire rifle developed during World War II. It is also known under the designations MP 43 and MP 44 ("Maschinenpistole 43", "Maschinenpistole 44" respectively). - The M16 rifle, officially designated "Rifle, Caliber 5.56mm, M16", is a United States military adaptation of the Armalite AR-15 rifle. The original M16 was a select-fire, 5.5645mm rifle with a 20-round magazine. - An assault rifle is a selective-fire rifle that uses an intermediate cartridge and a detachable magazine. Assault rifles were first used during World War II. Though Western nations were slow to accept the assault rifle concept after World War II, by the end of the 20th century they had become the standard weapon in most of the world's armies, replacing semi-automatic rifles, battle rifles and sub-machine guns in most roles. Examples include the StG 44, AK-47 and the M16 rifle. - A rifle is a firearm designed to be fired from the shoulder, with a barrel that has a helical groove or pattern of grooves ("rifling") cut into the barrel walls. The raised areas of the rifling are called "lands," which make contact with the projectile (for small arms usage, called a bullet), imparting spin around an axis corresponding to the orientation of the weapon. When the projectile leaves the barrel, this spin lends gyroscopic stability to the projectile and prevents tumbling, in the same way that a properly thrown American football or rugby ball behaves. This allows the use of aerodynamically-efficient bullets (as opposed to the spherical balls used in muskets) and thus improves range and accuracy. The word "rifle" originally referred to the grooving, and a rifle was called a "rifled gun." Rifles are used in warfare, hunting and shooting sports. - Johann Friedrich Wilhelm Adolf von Baeyer (31 October 1835 20 August 1917) was a German chemist who synthesised indigo, developed a nomenclature for cyclic compounds (that was subsequently extended and adopted as part of the IUPAC organic nomenclature) and was the 1905 recipient of the Nobel Prize in Chemistry. - A machine gun is a fully automatic mounted or portable firearm, designed to fire bullets in quick succession from an ammunition belt or magazine, typically at a rate of 300 to 1800 rounds per minute. Fully automatic firearms are generally categorized as submachine guns, assault rifles, battle rifles, automatic shotguns, machine guns, or autocannons. Machine guns with multiple rotating barrels are referred to as "rotary machine guns". - The AK-47, or AK as it is officially known (also known as the Kalashnikov) is a selective-fire (semi-automatic and automatic), gas-operated 7.6239 mm assault rifle, developed in the Soviet Union by Mikhail Kalashnikov. It is officially known in the Soviet documentation as "Avtomat Kalashnikova". - A semi-automatic rifle is a self-loading rifle that fires a single round each time the trigger is pulled. In contrast, a fully automatic rifle continuously fires rounds as long as the trigger is pressed and there is ammunition left. - The Chropi Rifle was an assault rifle built by Chropei ( Greek : ) , a Greek chemicals company , which used the '' Chropi '' spelling on its weapons . It was designed by a team under Sotiris Sofianopoulos ( apparently an original Greek Cypriot design ) and was proposed to the Greek Army in 1975 . It was a simple and rather outdated design , clearly inferior to the Heckler & Koch G3 , which was adopted ( produced by the state - run EBO company ) . The rifle was rejected after a series of tests indicated that the weapon itself did not adhere to all of the desired standards . The company , nonetheless , had created all necessary infrastructure for the rifle 's production and a small number were manufactured and delivered to the Greek Army but these ended up being kept in storage facilities . - A battle rifle is a military service rifle that fires a full-power rifle cartridge, such as 7.6251mm NATO, 7.6254mmR, 7.92x57mm Mauser, .303 British, or .30-06 Springfield. Compared to assault rifles and their intermediate cartridges, the higher-caliber rounds provide greater power and range, though they have greater weight and produce stronger recoil, making them less than ideal for fully automatic fire. - An intermediate cartridge is a rifle/carbine cartridge that is less powerful than typical full-power battle rifle cartridges, such as the .303 British, 7.6254mmR, 7.9257mm Mauser or .30-06 Springfield, but still has significantly longer effective range than pistol cartridges. As their recoil is significantly reduced compared to high power rifle cartridges, fully automatic rifles firing intermediate cartridges are relatively easy to control. However, even though less powerful than a traditional rifle cartridge, the ballistics are still sufficient for an effective range of , which are the maximum typical engagement ranges in modern combat. This allowed for the development of the assault rifle, a selective fire weapon that is more compact and lighter than rifles that fire full power cartridges. The first intermediate cartridge to see widespread service was the German 7.9233mm Kurz used in the StG 44. Other notable examples include the Soviet 7.6239mm used in the AK-47 and AKM series, and the American 5.5645mm NATO cartridge first used in the M16. - Chropei, also spelled as Chropi ( - , Piraeus Dye Works), was a historic Greek chemical company. It was founded in 1883 by chemists Spilios and Leontios Economides (the former having been a co-worker of Adolf von Baeyer) and has traditionally been a major synthetic dye and pharmaceuticals manufacturer. Given the information above, choose from the list below the object entity that exhibits the relation 'instance of' with the subject 'chropi rifle'. Choices: - abbreviation - ammunition - assault rifle - ball - barrel - battle rifle - carbine - cartridge - chemical - combat - cut - dye - fire - football - gun - machine - machine gun - magazine - military - nobel prize - nomenclature - october - part - pattern - pistol - prize - rifle - rifle cartridge - rifling - service - single - soviet - standard - time - war - weapon
A:
battle rifle