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BB (ammunition)
A BB gun is a type of air gun designed to shoot metallic ball projectiles called BBs (not to be confused with ball bearings), which are approximately the same size as BB-size lead birdshot (0.180 in or 4.6 mm in diameter). Modern BB guns usually have a smoothbore barrel with a 4.5 mm (0.177 in) caliber, and use steel balls that measure 4.3–4.4 mm (0.171–0.173 in) in diameter and 0.33–0.35 g (5.1–5.4 gr) in weight, usually zinc- or copper-plated for corrosion resistance
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Pellet Gun
A pellet is a non-spherical projectile designed to be shot from an air gun, and an airgun that shoots such pellets is commonly known as a pellet gun. Air gun pellets differ from bullets and shot used in firearms in terms of the pressures encountered; airguns operate at pressures as low as 50 atmospheres,[1] while firearms operate at thousands of atmospheres. Airguns generally use a slightly undersized projectile that is designed to obturate upon shooting so as to seal the bore, and engage the rifling;[citation needed] firearms have sufficient pressure to force a slightly oversized bullet to fit the bore in order to form a tight seal. Since pellets may be shot through a smoothbore barrel, they are often designed to be inherently stable, much like the Foster slugs used in smoothbore shotguns. The diabolo pellet (or "wasp waist pellet") is the most common design traditionally found in airguns
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Daisy Outdoor Products
Daisy Outdoor Products (known primarily as Daisy) is an American airgun manufacturer known particularly for their lines of BB guns. It was formed in 1882 initially as the Plymouth Iron Windmill Company to manufacture steel windmills, and from 1888 started bundling BB-caliber air guns with each windmill purchase as a sales promotion. With the unrivaled popularity of their 1888-model Daisy BB Guns, the company changed the name to Daisy Manufacturing Company in 1895 and switched their business to solely producing air guns for sale. Throughout the 20th century, Daisy has been known as a company that makes and sells BB guns and pellet youth rifles
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Pellet (air Gun)
A pellet is a non-spherical projectile designed to be shot from an air gun, and an airgun that shoots such pellets is commonly known as a pellet gun. Air gun pellets differ from bullets and shot used in firearms in terms of the pressures encountered; airguns operate at pressures as low as 50 atmospheres,[1] while firearms operate at thousands of atmospheres. Airguns generally use a slightly undersized projectile that is designed to obturate upon shooting so as to seal the bore, and engage the rifling;[citation needed] firearms have sufficient pressure to force a slightly oversized bullet to fit the bore in order to form a tight seal. Since pellets may be shot through a smoothbore barrel, they are often designed to be inherently stable, much like the Foster slugs used in smoothbore shotguns. The diabolo pellet (or "wasp waist pellet") is the most common design traditionally found in airguns
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Firearm
A firearm is any type of gun designed to be readily carried and used by an individual.[1][2][3] The term is legally defined further in different countries (see Legal definitions). The first primitive firearms originated in 10th-century China, when bamboo tubes containing gunpowder and pellet projectiles were mounted on spears to make the portable fire lance,[4] operable by a single person, which was later used to good effect in the Siege of De'an in 1132. In the 13th century, the Chinese invented the metal-barreled hand cannon, widely considered[by whom?] the true ancestor of all firearms. The technology gradually spread throughout the rest of East Asia, South Asia, the Middle East, and Europe. Older firearms typically used black powder as a propellant, but modern firearms use smokeless powder or other propellants
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Structural Integrity And Failure

Structural integrity and failure is an aspect of engineering that deals with the ability of a structure to support a designed structural load (weight, force, etc.) without breaking and includes the study of past structural failures in order to prevent failures in future designs. Structural integrity is the ability of an item—either a structural component or a structure consisting of many components—to hold together under a load, including its own weight, without breaking or deforming excessively. It assures that the construction will perform its designed function during reasonable use, for as long as its intended life span. Items are constructed with structural integrity to prevent catastrophic failure, which can result in injuries, severe damage, death, and/or monetary losses. Structural failure refers to the loss of structural integrity, or the loss of load-carrying capacity in either a structural component or the structure itself
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Shotshell
A shotgun shell, shotshell or simply shell is a type of cylindrical cartridge used specifically by shotguns, and is typically loaded with numerous small, generally spherical pellet-like metallic projectiles called shot. The shell casing usually consist of a paper or plastic tube mounted on a brass base holding a primer, and the shots are typically contained by a wadding/sabot inside the case.[1] The shots are traditionally made of lead, but steel, tungsten and bismuth are also used due to restrictions on lead.[2] A shotgun shell can sometimes also contain a single, large solid projectile known as a slug, which can also be made with specialty non-lethal rounds such as beanbag rounds and rubber
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